diff --git a/deerith_engine_client/include/deerith/universe.h b/deerith_engine_client/include/deerith/universe.h
deleted file mode 100644
index 92719c3..0000000
--- a/deerith_engine_client/include/deerith/universe.h
+++ /dev/null
@@ -1,11 +0,0 @@
-#pragma once
-#include <deerith/core/universe.h>
-
-namespace deerith
-{
-    bool connect_to_universe(const char *address, int port);
-    void shutdown_universe();
-
-    bool is_universe_running();
-    void render_universe();
-}
\ No newline at end of file
diff --git a/deerith_engine_client/include/deerith/world.h b/deerith_engine_client/include/deerith/world.h
new file mode 100644
index 0000000..ed8842b
--- /dev/null
+++ b/deerith_engine_client/include/deerith/world.h
@@ -0,0 +1,15 @@
+#pragma once
+#include <deerith/world/world_core.h>
+
+namespace deerith
+{
+    struct client_t;
+
+    bool connect_to_world(const char *address, int port);
+    void shutdown_world();
+
+    bool is_world_running();
+    void render_world();
+
+    client_t *get_server_client();
+}
\ No newline at end of file
diff --git a/deerith_engine_client/src/graphics/window.cpp b/deerith_engine_client/src/graphics/window.cpp
index 9589710..f51e8fd 100644
--- a/deerith_engine_client/src/graphics/window.cpp
+++ b/deerith_engine_client/src/graphics/window.cpp
@@ -1,7 +1,7 @@
 #include "deerith/graphics/window.h"
 #include "primitive_internals.h"
 #include "../network/network_internals.h"
-#include <deerith/universe.h>
+#include <deerith/world.h>
 
 #include <glad/gl.h>
 #include <GLFW/glfw3.h>
@@ -130,7 +130,7 @@ void deerith::shutdown_window()
     ImGui::DestroyContext();
 
     shutdown_primitives();
-    shutdown_universe();
+    shutdown_world();
     shutdown_network();
 
     glfwDestroyWindow(window);
diff --git a/deerith_engine_client/src/network/base_protocol.cpp b/deerith_engine_client/src/network/base_protocol.cpp
index 62745e1..ed1dc49 100644
--- a/deerith_engine_client/src/network/base_protocol.cpp
+++ b/deerith_engine_client/src/network/base_protocol.cpp
@@ -1,9 +1,9 @@
 #include <deerith/network/router.h>
 #include "network/network_internals.h"
 
-#include <deerith/packets/sync_universe_tick.h>
+#include <deerith/packets/sync_world_tick.h>
 
 void deerith::setup_base_protocols()
 {
-    router_add_packet_processor<sync_universe_tick_t>();
+    router_add_packet_processor<sync_world_tick_t>();
 }
\ No newline at end of file
diff --git a/deerith_engine_client/src/network/network.cpp b/deerith_engine_client/src/network/network.cpp
index 021216b..94d63a9 100644
--- a/deerith_engine_client/src/network/network.cpp
+++ b/deerith_engine_client/src/network/network.cpp
@@ -1,15 +1,24 @@
 #include <deerith/engine.h>
 #include <deerith/network/router.h>
+#include <deerith/world.h>
 
 #include <enet/enet.h>
 #include <thread>
+#include <memory>
 
 #include "network_internals.h"
 
 namespace deerith
 {
     ENetHost *client;
-    ENetPeer *client_peer;
+    ENetPeer *server_peer;
+
+    std::unique_ptr<client_t> server_client;
+}
+
+deerith::client_t *deerith::get_server_client()
+{
+    return server_client.get();
 }
 
 void deerith::connect_to_server(const char *address, int port)
@@ -23,8 +32,10 @@ void deerith::connect_to_server(const char *address, int port)
     client = enet_host_create(NULL, 1, 2, 0, 0);
     deerith_assert(client, "connect_to_server failed to create host");
 
-    client_peer = enet_host_connect(client, &eaddress, 2, 0);
-    deerith_assert(client_peer, "enet_host_connect failed on connect_to_server");
+    server_peer = enet_host_connect(client, &eaddress, 2, 0);
+    deerith_assert(server_peer, "enet_host_connect failed on connect_to_server");
+
+    server_client = std::make_unique<client_t>(server_peer);
 }
 
 int deerith::init_network()
@@ -58,7 +69,7 @@ void deerith::flush_network_events()
 
         case ENET_EVENT_TYPE_RECEIVE:
             ENetPacket *packet = event.packet;
-            router_process_packet(packet->data, packet->dataLength);
+            router_process_packet(packet->data, packet->dataLength, server_client.get());
             enet_packet_destroy(event.packet);
             break;
         }
@@ -75,7 +86,7 @@ bool deerith::wait_till_connected_to_server()
     }
     else
     {
-        enet_peer_reset(client_peer);
+        enet_peer_reset(server_peer);
         deerith_error("failed to connect to server");
         return false;
     }
diff --git a/deerith_engine_client/src/universe/universe.cpp b/deerith_engine_client/src/universe/universe.cpp
deleted file mode 100644
index d3d5f1a..0000000
--- a/deerith_engine_client/src/universe/universe.cpp
+++ /dev/null
@@ -1,59 +0,0 @@
-#include <deerith/engine.h>
-#include <deerith/universe.h>
-
-#include "network/network_internals.h"
-
-#include <thread>
-#include <memory>
-
-namespace deerith
-{
-    std::unique_ptr<std::thread> universe_thread;
-    std::atomic<bool> universe_running = false;
-
-    void universe_simulation();
-}
-
-bool deerith::connect_to_universe(const char *address, int port)
-{
-    deerith_assert(!universe_running, "connect_to_universe failed because there is a current running universe");
-
-    shutdown_universe();
-    connect_to_server(address, port);
-
-    if (!wait_till_connected_to_server())
-    {
-        deerith_error("engine was not able to connect to server");
-        return false;
-    }
-
-    universe_running = true;
-    universe_thread = std::make_unique<std::thread>(universe_simulation);
-    return true;
-}
-
-bool deerith::is_universe_running()
-{
-    return universe_running;
-}
-
-void deerith::universe_simulation()
-{
-    while (universe_running)
-    {
-        flush_network_events();
-
-        wait_till_next_click();
-    }
-
-    universe_running = false;
-    deerith_trace("universe shutdown");
-}
-
-void deerith::shutdown_universe()
-{
-    universe_running = false;
-    if (universe_thread && universe_thread->joinable())
-        universe_thread->join();
-    universe_thread.reset();
-}
diff --git a/deerith_engine_client/src/universe/universe_protocols.cpp b/deerith_engine_client/src/universe/universe_protocols.cpp
deleted file mode 100644
index a70ee4d..0000000
--- a/deerith_engine_client/src/universe/universe_protocols.cpp
+++ /dev/null
@@ -1,14 +0,0 @@
-#include <deerith/packets/sync_universe_tick.h>
-#include <deerith/network/router.h>
-#include <deerith/universe.h>
-
-namespace deerith
-{
-}
-
-template <>
-void deerith::process_packet(sync_universe_tick_t &universe_tick)
-{
-    deerith_trace("sync_universe_tick_t tick set to {}", universe_tick.tick_id);
-    set_tick(universe_tick.tick_id);
-}
\ No newline at end of file
diff --git a/deerith_engine_client/src/universe/universe_render.cpp b/deerith_engine_client/src/universe/universe_render.cpp
deleted file mode 100644
index ed0257c..0000000
--- a/deerith_engine_client/src/universe/universe_render.cpp
+++ /dev/null
@@ -1,5 +0,0 @@
-#include <deerith/universe.h>
-
-void deerith::render_universe()
-{
-}
\ No newline at end of file
diff --git a/deerith_engine_client/src/world/player_movment.cpp b/deerith_engine_client/src/world/player_movment.cpp
new file mode 100644
index 0000000..58a47c8
--- /dev/null
+++ b/deerith_engine_client/src/world/player_movment.cpp
@@ -0,0 +1,27 @@
+#include <deerith/engine.h>
+#include <deerith/graphics/input.h>
+#include <deerith/network/router.h>
+
+#include <deerith/world/character_sync_interface.h>
+#include <deerith/packets/sync_character_interface.h>
+
+#include "world/world_internals.h"
+
+namespace deerith
+{
+    extern character_sync_interface_t character_sync_interface;
+}
+
+void deerith::process_player_input()
+{
+    glm::vec2 movment = get_joystick_axes(0, 0);
+    character_sync_interface.move_input.push_value(movment);
+}
+
+void deerith::send_player_input()
+{
+    sync_character_interface_t sync_character_interface;
+    sync_character_interface.load(character_sync_interface);
+
+    router_send_packet<sync_character_interface_t>(sync_character_interface, get_server_client());
+}
\ No newline at end of file
diff --git a/deerith_engine_client/src/world/universe.cpp b/deerith_engine_client/src/world/universe.cpp
new file mode 100644
index 0000000..48b96d9
--- /dev/null
+++ b/deerith_engine_client/src/world/universe.cpp
@@ -0,0 +1,71 @@
+#include <deerith/engine.h>
+#include <deerith/world.h>
+
+#include <deerith/world/character_sync_interface.h>
+
+#include "network/network_internals.h"
+#include "world/world_internals.h"
+
+#include <thread>
+#include <memory>
+
+namespace deerith
+{
+    std::unique_ptr<std::thread> world_thread;
+    std::atomic<bool> world_running = false;
+
+    character_sync_interface_t character_sync_interface;
+
+    void world_simulation();
+}
+
+bool deerith::connect_to_world(const char *address, int port)
+{
+    deerith_assert(!world_running, "connect_to_world failed because there is a current running world");
+
+    shutdown_world();
+    connect_to_server(address, port);
+
+    if (!wait_till_connected_to_server())
+    {
+        deerith_error("engine was not able to connect to server");
+        return false;
+    }
+
+    world_running = true;
+    world_thread = std::make_unique<std::thread>(world_simulation);
+    return true;
+}
+
+bool deerith::is_world_running()
+{
+    return world_running;
+}
+
+void deerith::world_simulation()
+{
+    while (world_running)
+    {
+        flush_network_events();
+
+        process_player_input();
+
+        if (get_world_tick() % 2 == 0)
+        {
+            send_player_input();
+        }
+
+        wait_till_next_click();
+    }
+
+    world_running = false;
+    deerith_trace("world shutdown");
+}
+
+void deerith::shutdown_world()
+{
+    world_running = false;
+    if (world_thread && world_thread->joinable())
+        world_thread->join();
+    world_thread.reset();
+}
diff --git a/deerith_engine_client/src/world/universe_internals.h b/deerith_engine_client/src/world/universe_internals.h
new file mode 100644
index 0000000..19a5a1a
--- /dev/null
+++ b/deerith_engine_client/src/world/universe_internals.h
@@ -0,0 +1,7 @@
+#pragma once
+
+namespace deerith
+{
+    void process_player_input();
+    void send_player_input();
+}
diff --git a/deerith_engine_client/src/world/universe_protocols.cpp b/deerith_engine_client/src/world/universe_protocols.cpp
new file mode 100644
index 0000000..2dafda8
--- /dev/null
+++ b/deerith_engine_client/src/world/universe_protocols.cpp
@@ -0,0 +1,14 @@
+#include <deerith/packets/sync_world_tick.h>
+#include <deerith/network/router.h>
+#include <deerith/world.h>
+
+namespace deerith
+{
+}
+
+template <>
+void deerith::process_packet(sync_world_tick_t &world_tick, client_t *client)
+{
+    deerith_trace("sync_world_tick_t tick set to {}", world_tick.tick_id);
+    set_tick(world_tick.tick_id);
+}
\ No newline at end of file
diff --git a/deerith_engine_client/src/world/universe_render.cpp b/deerith_engine_client/src/world/universe_render.cpp
new file mode 100644
index 0000000..a9e95ab
--- /dev/null
+++ b/deerith_engine_client/src/world/universe_render.cpp
@@ -0,0 +1,5 @@
+#include <deerith/world.h>
+
+void deerith::render_world()
+{
+}
\ No newline at end of file
diff --git a/deerith_engine_core/include/deerith/core/serialization_ext.h b/deerith_engine_core/include/deerith/core/serialization_ext.h
new file mode 100644
index 0000000..7d880cf
--- /dev/null
+++ b/deerith_engine_core/include/deerith/core/serialization_ext.h
@@ -0,0 +1,18 @@
+#pragma once
+
+#include <glm/glm.hpp>
+
+namespace cereal
+{
+    template <class Archive>
+    void serialize(Archive &archive, glm::vec2 &vec)
+    {
+        archive(vec.x, vec.y);
+    }
+
+    template <class Archive>
+    void serialize(Archive &archive, glm::vec3 &vec)
+    {
+        archive(vec.x, vec.y, vec.z);
+    }
+}
\ No newline at end of file
diff --git a/deerith_engine_core/include/deerith/engine.h b/deerith_engine_core/include/deerith/engine.h
index 87e264f..c93d45a 100644
--- a/deerith_engine_core/include/deerith/engine.h
+++ b/deerith_engine_core/include/deerith/engine.h
@@ -3,8 +3,9 @@
 #include <deerith/core/log.h>
 #include <deerith/core/core.h>
 
-#define UNIVERSE_SIMULATION_TICK_FREQ 50
+#define world_SIMULATION_TICK_FREQ 50
 #define NETWORK_RELATIVE_TICK 2
+
 #define NETWORK_DELAY 10
 
 namespace deerith
diff --git a/deerith_engine_core/include/deerith/network/client.h b/deerith_engine_core/include/deerith/network/client.h
new file mode 100644
index 0000000..eb02856
--- /dev/null
+++ b/deerith_engine_core/include/deerith/network/client.h
@@ -0,0 +1,11 @@
+#pragma once
+#include <enet/enet.h>
+
+namespace deerith
+{
+    struct client_t
+    {
+        client_t(ENetPeer *_peer) : peer(_peer) {}
+        ENetPeer *peer;
+    };
+}
\ No newline at end of file
diff --git a/deerith_engine_core/include/deerith/network/router.h b/deerith_engine_core/include/deerith/network/router.h
index 88fed75..ac2a59d 100644
--- a/deerith_engine_core/include/deerith/network/router.h
+++ b/deerith_engine_core/include/deerith/network/router.h
@@ -1,5 +1,6 @@
 #pragma once
 #include <deerith/engine.h>
+#include <deerith/network/client.h>
 
 #include <cereal/cereal.hpp>
 #include <cereal/archives/portable_binary.hpp>
@@ -10,25 +11,31 @@
 
 namespace deerith
 {
-    using packet_processor_t = std::function<void(const uint8_t *, size_t)>;
+    using packet_processor_t = std::function<void(const uint8_t *, size_t, client_t *)>;
     extern std::unordered_map<uint16_t, packet_processor_t> packet_processors;
 
     template <typename T>
     void router_add_packet_processor();
-    void router_process_packet(const uint8_t *data, size_t size);
+    void router_process_packet(const uint8_t *data, size_t size, client_t *client);
 
     template <typename T>
-    void router_send_packet(T &, ENetPeer *);
+    void router_send_packet(T &, client_t *);
 
     template <typename T>
-    void process_packet(T &);
+    void process_packet(T &, client_t *client);
 }
 
 template <typename T>
 void deerith::router_add_packet_processor()
 {
-    packet_processors[T::packet_id] = [](const uint8_t *data, size_t size)
+    packet_processors[T::packet_id] = [](const uint8_t *data, size_t size, client_t *client)
     {
+        if (!client)
+        {
+            deerith_error("router_add_packet_processor client is nullptr");
+            return;
+        }
+
         std::string buffer(reinterpret_cast<const char *>(data), size);
         std::istringstream stream(buffer, std::ios::in | std::ios::binary);
 
@@ -37,14 +44,20 @@ void deerith::router_add_packet_processor()
         T packet{};
         archive(packet);
 
-        process_packet<T>(packet);
+        process_packet<T>(packet, client);
     };
 }
 
 template <typename T>
-void deerith::router_send_packet(T &packet, ENetPeer *peer)
+void deerith::router_send_packet(T &packet, client_t *client)
 {
 
+    if (!client)
+    {
+        deerith_error("router_send_packet client is nullptr");
+        return;
+    }
+
     std::ostringstream stream(std::ios::out | std::ios::binary);
     cereal::PortableBinaryOutputArchive archive(stream);
 
@@ -73,7 +86,7 @@ void deerith::router_send_packet(T &packet, ENetPeer *peer)
         return;
     }
 
-    if (enet_peer_send(peer, 0, enet_packet) < 0)
+    if (enet_peer_send(client->peer, 0, enet_packet) < 0)
     {
         enet_packet_destroy(enet_packet);
         deerith_error("failed to send ENet packet");
diff --git a/deerith_engine_core/include/deerith/network/sync_variable.h b/deerith_engine_core/include/deerith/network/sync_variable.h
index a0434c8..f0fe8c4 100644
--- a/deerith_engine_core/include/deerith/network/sync_variable.h
+++ b/deerith_engine_core/include/deerith/network/sync_variable.h
@@ -1,27 +1,110 @@
 #pragma once
 #include <deerith/engine.h>
+#include <deerith/world.h>
+
 #include <glm/glm.hpp>
 #include <array>
 
-#define BUFFER_SIZE (NETWORK_DELAY + 20)
+#include <cereal/types/array.hpp>
+#include <deerith/core/serialization_ext.h>
+
+#define SYNC_VARIABLE_STORAGE 30
+#define BUFFER_SIZE (NETWORK_DELAY + SYNC_VARIABLE_STORAGE)
 
 namespace deerith
 {
+    inline size_t get_sync_variable_index(size_t tick = get_world_tick())
+    {
+        return ((size_t)tick) % BUFFER_SIZE;
+    };
+
+    template <typename T>
+    struct sync_variable_transport_t;
+
     template <typename T>
     struct sync_variable_entry_t
     {
         T value;
-        uint32_t tick_id;
+        int tick_id = 0;
+
+        template <typename Archive>
+        void serialize(Archive &archive)
+        {
+            archive(value);
+            archive(tick_id);
+        }
     };
 
     template <typename T>
     class sync_variable_t
     {
     public:
-        ~sync_variable_t() override = default;
+        T pull_value()
+        {
+            sync_variable_entry_t<T> &entry = buffer[get_sync_variable_index()];
+            if (entry.tick_id != get_world_tick())
+            {
+                return T();
+            }
+            return entry.value;
+        }
+
+        void push_value(const T &v)
+        {
+            set_value(v, get_world_tick() + NETWORK_DELAY);
+        }
+
+        void set_value(const T &v, int tick_id = 0)
+        {
+            if (tick_id > get_world_tick() + SYNC_VARIABLE_STORAGE)
+            {
+                deerith_error("set_value error, tick_id > get_world_tick() + SYNC_VARIABLE_STORAGE, tick_id : {}", tick_id);
+                return;
+            }
+            sync_variable_entry_t<T> &entry = buffer[get_sync_variable_index(tick_id)];
+            entry.tick_id = tick_id;
+            entry.value = v;
+        }
 
     private:
         std::array<sync_variable_entry_t<T>, BUFFER_SIZE> buffer;
+        friend sync_variable_transport_t<T>;
     };
 
+    template <typename T>
+    struct sync_variable_transport_t
+    {
+        std::array<sync_variable_entry_t<T>, NETWORK_DELAY> variable_transport_data;
+
+        void load(const sync_variable_t<T> &sync_var)
+        {
+            int begin_tick_id = get_world_tick();
+
+            for (int i = 0; i < NETWORK_DELAY; i++)
+            {
+                variable_transport_data[i] =
+                    sync_var.buffer[get_sync_variable_index(i + begin_tick_id)];
+            }
+        }
+
+        void dipose(sync_variable_t<T> &sync_var)
+        {
+            int begin_tick_id = get_world_tick();
+            for (int i = 0; i < NETWORK_DELAY; i++)
+            {
+                const sync_variable_entry_t<T> &entry = variable_transport_data[i];
+                if (entry.tick_id < begin_tick_id || entry.tick_id >= begin_tick_id + NETWORK_DELAY)
+                {
+                    continue;
+                }
+                sync_var.buffer[get_sync_variable_index(entry.tick_id)] = entry;
+            }
+        }
+
+        template <typename Archive>
+        void serialize(Archive &archive)
+        {
+            archive(variable_transport_data);
+        }
+    };
 }
\ No newline at end of file
diff --git a/deerith_engine_core/include/deerith/packets/sync_character_interface.h b/deerith_engine_core/include/deerith/packets/sync_character_interface.h
new file mode 100644
index 0000000..6cad0b9
--- /dev/null
+++ b/deerith_engine_core/include/deerith/packets/sync_character_interface.h
@@ -0,0 +1,30 @@
+#pragma once
+#include <deerith/engine.h>
+#include <deerith/world/character_sync_interface.h>
+
+namespace deerith
+{
+    struct sync_character_interface_t
+    {
+        static constexpr uint16_t packet_id = 2;
+        static constexpr bool reliable = false;
+
+        sync_variable_transport_t<glm::vec2> move_input_transport;
+
+        void load(const character_sync_interface_t &ci)
+        {
+            move_input_transport.load(ci.move_input);
+        }
+
+        void dipose(character_sync_interface_t &ci)
+        {
+            move_input_transport.load(ci.move_input);
+        }
+
+        template <typename Archive>
+        void serialize(Archive &archive)
+        {
+            archive(move_input_transport);
+        }
+    };
+}
\ No newline at end of file
diff --git a/deerith_engine_core/include/deerith/packets/sync_universe_tick.h b/deerith_engine_core/include/deerith/packets/sync_world_tick.h
similarity index 91%
rename from deerith_engine_core/include/deerith/packets/sync_universe_tick.h
rename to deerith_engine_core/include/deerith/packets/sync_world_tick.h
index 2b6447c..8667d08 100644
--- a/deerith_engine_core/include/deerith/packets/sync_universe_tick.h
+++ b/deerith_engine_core/include/deerith/packets/sync_world_tick.h
@@ -3,7 +3,7 @@
 
 namespace deerith
 {
-    struct sync_universe_tick_t
+    struct sync_world_tick_t
     {
         static constexpr uint16_t packet_id = 1;
         static constexpr bool reliable = true;
diff --git a/deerith_engine_core/include/deerith/world/character.h b/deerith_engine_core/include/deerith/world/character.h
new file mode 100644
index 0000000..cdc66ae
--- /dev/null
+++ b/deerith_engine_core/include/deerith/world/character.h
@@ -0,0 +1,10 @@
+#pragma once
+#include <deerith/world/character_sync_interface.h>
+
+namespace deerith
+{
+    struct character_t
+    {
+    };
+
+}
\ No newline at end of file
diff --git a/deerith_engine_core/include/deerith/network/sync_user.h b/deerith_engine_core/include/deerith/world/character_sync_interface.h
similarity index 82%
rename from deerith_engine_core/include/deerith/network/sync_user.h
rename to deerith_engine_core/include/deerith/world/character_sync_interface.h
index c9ea1da..e11a1f5 100644
--- a/deerith_engine_core/include/deerith/network/sync_user.h
+++ b/deerith_engine_core/include/deerith/world/character_sync_interface.h
@@ -3,7 +3,7 @@
 
 namespace deerith
 {
-    struct sync_user_t
+    struct character_sync_interface_t
     {
         sync_variable_t<glm::vec2> move_input;
         sync_variable_t<glm::vec2> position;
diff --git a/deerith_engine_core/include/deerith/core/universe.h b/deerith_engine_core/include/deerith/world/world_core.h
similarity index 77%
rename from deerith_engine_core/include/deerith/core/universe.h
rename to deerith_engine_core/include/deerith/world/world_core.h
index 12af6fd..3ca0c06 100644
--- a/deerith_engine_core/include/deerith/core/universe.h
+++ b/deerith_engine_core/include/deerith/world/world_core.h
@@ -3,8 +3,10 @@
 
 namespace deerith
 {
-    uint32_t get_universe_tick();
+    uint32_t get_world_tick();
     void wait_till_next_click();
 
     void set_tick(uint32_t);
-}
\ No newline at end of file
+
+}
+^^
\ No newline at end of file
diff --git a/deerith_engine_core/src/router.cpp b/deerith_engine_core/src/router.cpp
index d5bd73d..f710949 100644
--- a/deerith_engine_core/src/router.cpp
+++ b/deerith_engine_core/src/router.cpp
@@ -8,7 +8,7 @@ namespace deerith
     std::unordered_map<uint16_t, packet_processor_t> packet_processors;
 }
 
-void deerith::router_process_packet(const uint8_t *data, size_t size)
+void deerith::router_process_packet(const uint8_t *data, size_t size, client_t *client)
 {
     if (size <= 2)
     {
@@ -23,5 +23,5 @@ void deerith::router_process_packet(const uint8_t *data, size_t size)
         return;
     }
 
-    packet_processors[packet_id](&data[2], size - 2);
+    packet_processors[packet_id](&data[2], size - 2, client);
 }
\ No newline at end of file
diff --git a/deerith_engine_core/src/tick.cpp b/deerith_engine_core/src/tick.cpp
index 32decee..a674080 100644
--- a/deerith_engine_core/src/tick.cpp
+++ b/deerith_engine_core/src/tick.cpp
@@ -1,4 +1,4 @@
-#include <deerith/core/universe.h>
+#include <deerith/world/world_core.h>
 
 #include <chrono>
 #include <thread>
@@ -13,7 +13,7 @@ void deerith::set_tick(uint32_t v)
     tick_id = v;
 }
 
-uint32_t deerith::get_universe_tick()
+uint32_t deerith::get_world_tick()
 {
     return tick_id;
 }
diff --git a/deerith_engine_server/CMakeLists.txt b/deerith_engine_server/CMakeLists.txt
index 89149dc..652c56f 100644
--- a/deerith_engine_server/CMakeLists.txt
+++ b/deerith_engine_server/CMakeLists.txt
@@ -11,6 +11,8 @@ target_sources(DeerithServer
 )
 
 target_include_directories(DeerithServer
+    PRIVATE
+        ${CMAKE_CURRENT_SOURCE_DIR}/src
     PUBLIC
         ${CMAKE_CURRENT_SOURCE_DIR}/include
 )
diff --git a/deerith_engine_server/include/deerith/universe.h b/deerith_engine_server/include/deerith/universe.h
deleted file mode 100644
index 4822678..0000000
--- a/deerith_engine_server/include/deerith/universe.h
+++ /dev/null
@@ -1,10 +0,0 @@
-#pragma once
-#include <deerith/core/universe.h>
-
-namespace deerith
-{
-    void run_universe(int port);
-    void shutdown_universe();
-
-    bool is_universe_running();
-}
\ No newline at end of file
diff --git a/deerith_engine_server/include/deerith/world.h b/deerith_engine_server/include/deerith/world.h
new file mode 100644
index 0000000..686dd4d
--- /dev/null
+++ b/deerith_engine_server/include/deerith/world.h
@@ -0,0 +1,10 @@
+#pragma once
+#include <deerith/world/world_core.h>
+
+namespace deerith
+{
+    void run_world(int port);
+    void shutdown_world();
+
+    bool is_world_running();
+}
\ No newline at end of file
diff --git a/deerith_engine_server/src/network/base_protocols.cpp b/deerith_engine_server/src/network/base_protocols.cpp
new file mode 100644
index 0000000..742e671
--- /dev/null
+++ b/deerith_engine_server/src/network/base_protocols.cpp
@@ -0,0 +1,9 @@
+#include "network/network_internals.h"
+#include <deerith/network/router.h>
+
+#include <deerith/packets/sync_character_interface.h>
+
+void deerith::load_base_protocols()
+{
+    router_add_packet_processor<sync_character_interface_t>();
+}
\ No newline at end of file
diff --git a/deerith_engine_server/src/network/network.cpp b/deerith_engine_server/src/network/network.cpp
index fd53dce..772f636 100644
--- a/deerith_engine_server/src/network/network.cpp
+++ b/deerith_engine_server/src/network/network.cpp
@@ -1,10 +1,15 @@
 #include <deerith/core/log.h>
-#include <enet/enet.h>
+#include <deerith/network/client.h>
+#include <deerith/network/router.h>
+#include <deerith/packets/sync_world_tick.h>
 
-#include <deerith/core/log.h>
+#include <deerith/world.h>
+
+#include <enet/enet.h>
 
 #include <thread>
 #include <vector>
+#include <memory>
 
 #include "network_internals.h"
 
@@ -12,7 +17,9 @@ namespace deerith
 {
     ENetHost *server;
 
-    std::vector<ENetPeer *> new_clients;
+    std::vector<std::unique_ptr<client_t>> clients;
+
+    void create_client(ENetPeer *peer);
 }
 
 bool deerith::init_server(int port)
@@ -29,6 +36,9 @@ bool deerith::init_server(int port)
         deerith_error("init_server failed");
         return false;
     }
+
+    load_base_protocols();
+
     return true;
 }
 
@@ -48,23 +58,15 @@ void deerith::shutdown_network()
     enet_deinitialize();
 }
 
-std::vector<ENetPeer *> &deerith::get_new_clients()
-{
-    return new_clients;
-}
-
 void deerith::flush_network_events()
 {
     ENetEvent event;
-    new_clients.clear();
-
-    int result = 1;
-    while ((result = enet_host_service(server, &event, 0)) > 0)
+    while (enet_host_service(server, &event, 0) > 0)
     {
         switch (event.type)
         {
         case ENET_EVENT_TYPE_CONNECT:
-            new_clients.push_back(event.peer);
+            create_client(event.peer);
             break;
 
         case ENET_EVENT_TYPE_DISCONNECT:
@@ -72,17 +74,27 @@ void deerith::flush_network_events()
             break;
 
         case ENET_EVENT_TYPE_RECEIVE:
-            printf("A packet of length %lu containing %s was received from %s on channel %u.\n",
-                   event.packet->dataLength,
-                   event.packet->data,
-                   event.peer->data,
-                   event.channelID);
-
+            ENetPacket *packet = event.packet;
+            router_process_packet(packet->data, packet->dataLength, (client_t *)event.peer->data);
             enet_packet_destroy(event.packet);
             break;
-
-        case ENET_EVENT_TYPE_NONE:
-            break;
         }
     }
 }
+
+void deerith::create_client(ENetPeer *peer)
+{
+    char enet_address[32];
+    enet_address_get_host_ip(&peer->address, enet_address, 31);
+    deerith_trace("a new client has connected : {}", enet_address);
+
+    sync_world_tick_t sync_world_tick;
+    sync_world_tick.tick_id = get_world_tick();
+
+    std::unique_ptr<client_t> client = std::make_unique<client_t>(peer);
+    peer->data = client.get();
+
+    clients.push_back(std::move(client));
+
+    router_send_packet<sync_world_tick_t>(sync_world_tick, (client_t *)peer->data);
+}
\ No newline at end of file
diff --git a/deerith_engine_server/src/network/network_internals.h b/deerith_engine_server/src/network/network_internals.h
index a431c17..5722c1b 100644
--- a/deerith_engine_server/src/network/network_internals.h
+++ b/deerith_engine_server/src/network/network_internals.h
@@ -10,5 +10,6 @@ namespace deerith
     bool init_server(int port);
     void flush_network_events();
 
-    std::vector<ENetPeer *> &get_new_clients();
+    void load_base_protocols();
+
 }
\ No newline at end of file
diff --git a/deerith_engine_server/src/universe.cpp b/deerith_engine_server/src/universe.cpp
deleted file mode 100644
index e3b3a5c..0000000
--- a/deerith_engine_server/src/universe.cpp
+++ /dev/null
@@ -1,70 +0,0 @@
-#include <deerith/universe.h>
-
-#include <deerith/core/log.h>
-#include <deerith/network/router.h>
-
-#include <deerith/packets/sync_universe_tick.h>
-
-#include "network/network_internals.h"
-
-#include <csignal>
-#include <atomic>
-
-namespace deerith
-{
-    int universe_tick = 0;
-    void universe_simulation();
-
-    std::atomic<bool> running = true;
-
-    void create_client(ENetPeer *peer);
-    void handle_signal(int signal);
-}
-
-void deerith::handle_signal(int signal)
-{
-    if (signal == SIGTERM)
-        running = false;
-}
-
-void deerith::run_universe(int port)
-{
-    std::signal(SIGTERM, handle_signal);
-
-    if (init_server(port))
-    {
-        deerith_trace("server init on port {}", port);
-        while (running)
-        {
-            universe_simulation();
-        }
-    }
-    else
-    {
-        deerith_error("could not init server");
-    }
-}
-
-void deerith::universe_simulation()
-{
-    flush_network_events();
-
-    for (ENetPeer *new_client : get_new_clients())
-    {
-        create_client(new_client);
-    }
-
-    wait_till_next_click();
-}
-
-void deerith::create_client(ENetPeer *client)
-{
-    char enet_address[32];
-    enet_address_get_host_ip(&client->address, enet_address, 31);
-    deerith_trace("A new client has connected : {}", enet_address);
-
-    sync_universe_tick_t sync_universe_tick;
-    sync_universe_tick.tick_id = get_universe_tick();
-
-    router_send_packet<sync_universe_tick_t>(sync_universe_tick, client);
-}
\ No newline at end of file
diff --git a/deerith_engine_server/src/world.cpp b/deerith_engine_server/src/world.cpp
new file mode 100644
index 0000000..352852e
--- /dev/null
+++ b/deerith_engine_server/src/world.cpp
@@ -0,0 +1,51 @@
+#include <deerith/world.h>
+
+#include <deerith/core/log.h>
+#include "network/network_internals.h"
+
+#include <csignal>
+#include <atomic>
+
+namespace deerith
+{
+    int world_tick = 0;
+    void world_simulation();
+
+    std::atomic<bool> running = true;
+
+    void create_client(ENetPeer *peer);
+    void handle_signal(int signal);
+}
+
+void deerith::handle_signal(int signal)
+{
+    if (signal == SIGTERM)
+        running = false;
+}
+
+void deerith::run_world(int port)
+{
+    std::signal(SIGTERM, handle_signal);
+
+    if (init_server(port))
+    {
+        deerith_trace("server init on port {}", port);
+        while (running)
+        {
+            world_simulation();
+        }
+    }
+    else
+    {
+        deerith_error("could not init server");
+    }
+}
+
+void deerith::world_simulation()
+{
+    flush_network_events();
+
+    // process movments
+
+    wait_till_next_click();
+}
diff --git a/deerith_engine_server/src/world/character_sync.cpp b/deerith_engine_server/src/world/character_sync.cpp
new file mode 100644
index 0000000..774598f
--- /dev/null
+++ b/deerith_engine_server/src/world/character_sync.cpp
@@ -0,0 +1,15 @@
+#include <deerith/engine.h>
+
+#include <deerith/packets/sync_character_interface.h>
+#include <deerith/network/router.h>
+
+namespace deerith
+{
+
+}
+
+template <>
+void deerith::process_packet(sync_character_interface_t &interface, client_t *client)
+{
+    deerith_trace("sync player input {} {}");
+}
diff --git a/deerith_engine_server/src/world/universe_internals.h b/deerith_engine_server/src/world/universe_internals.h
new file mode 100644
index 0000000..5b1d841
--- /dev/null
+++ b/deerith_engine_server/src/world/universe_internals.h
@@ -0,0 +1,6 @@
+#pragma once
+
+namespace deerith
+{
+    void update_players_characters();
+}
\ No newline at end of file
diff --git a/deerith_engine_server/src/world/universe_simulation.cpp b/deerith_engine_server/src/world/universe_simulation.cpp
new file mode 100644
index 0000000..116967b
--- /dev/null
+++ b/deerith_engine_server/src/world/universe_simulation.cpp
@@ -0,0 +1,5 @@
+#include "world/world_internals.h"
+
+void update_players_characters()
+{
+}
\ No newline at end of file
diff --git a/sandbox/src/runtime/main.cpp b/sandbox/src/runtime/main.cpp
index 1b535bf..0d542e8 100644
--- a/sandbox/src/runtime/main.cpp
+++ b/sandbox/src/runtime/main.cpp
@@ -1,5 +1,5 @@
 #include <deerith/engine.h>
-#include <deerith/universe.h>
+#include <deerith/world.h>
 #include <thread>
 
 #ifdef DEERITH_CLIENT
@@ -11,7 +11,7 @@ int main(int args_count, const char **args)
     deerith::init_engine();
 
 #ifdef DEERITH_SERVER
-    deerith::run_universe(8080);
+    deerith::run_world(8080);
 #endif
 
 #ifdef DEERITH_CLIENT
@@ -24,13 +24,13 @@ int main(int args_count, const char **args)
 
     std::this_thread::sleep_for(std::chrono::milliseconds(100));
 
-    if (deerith::connect_to_universe("127.0.0.1", 8080))
+    if (deerith::connect_to_world("127.0.0.1", 8080))
     {
         deerith_assert(deerith::init_window() == 0, "Failed to init_window");
 
         while (deerith::begin_window_display())
         {
-            deerith::render_universe();
+            deerith::render_world();
 
             deerith::finish_window_display();
         }