diff --git a/deerith_engine_client/CMakeLists.txt b/deerith_engine_client/CMakeLists.txt
index 6b3b35c..8a310f9 100644
--- a/deerith_engine_client/CMakeLists.txt
+++ b/deerith_engine_client/CMakeLists.txt
@@ -37,4 +37,9 @@ add_custom_target(DeerithClientShaders ALL
         ${CMAKE_CURRENT_BINARY_DIR}/shaders
 )
 
+target_compile_definitions(DeerithClient
+    PUBLIC
+        DEERITH_CLIENT
+)
+
 add_dependencies(DeerithClient DeerithClientShaders)
\ No newline at end of file
diff --git a/deerith_engine_core/include/deerith/engine.h b/deerith_engine_core/include/deerith/engine.h
new file mode 100644
index 0000000..b5619bf
--- /dev/null
+++ b/deerith_engine_core/include/deerith/engine.h
@@ -0,0 +1,7 @@
+#pragma once
+
+namespace deerith
+{
+    void init_engine();
+    void shutdown_enigne();
+}
\ No newline at end of file
diff --git a/deerith_engine_server/CMakeLists.txt b/deerith_engine_server/CMakeLists.txt
index 4764c38..08b8584 100644
--- a/deerith_engine_server/CMakeLists.txt
+++ b/deerith_engine_server/CMakeLists.txt
@@ -19,3 +19,8 @@ target_link_libraries(DeerithServer
     PUBLIC
         DeerithCore
 )
+
+target_compile_definitions(DeerithServer
+    PUBLIC
+        DEERITH_SERVER
+)
\ No newline at end of file
diff --git a/deerith_engine_server/include/universe/universe.h b/deerith_engine_server/include/universe/universe.h
new file mode 100644
index 0000000..7822240
--- /dev/null
+++ b/deerith_engine_server/include/universe/universe.h
@@ -0,0 +1,9 @@
+#pragma once
+
+namespace deerith
+{
+    void init_universe_serve(int port);
+    void shutdown_universe();
+
+    bool is_universe_running();
+}
\ No newline at end of file
diff --git a/deerith_engine_server/src/network/network.cpp b/deerith_engine_server/src/network/network.cpp
new file mode 100644
index 0000000..7f39a65
--- /dev/null
+++ b/deerith_engine_server/src/network/network.cpp
@@ -0,0 +1,63 @@
+#include <deerith/core/log.h>
+#include <enet/enet.h>
+
+#include <deerith/core/log.h>
+
+#include <thread>
+
+#include "network_internals.h"
+
+namespace deerith
+{
+    ENetHost *client;
+    ENetPeer *client_peer;
+}
+
+void deerith::connect_to_server(const char *address, int port)
+{
+    ENetAddress eaddress = {0};
+    eaddress.port = port;
+
+    int result = enet_address_set_host(&eaddress, address);
+    deerith_client_assert(result == 0, "connect_to_server invalid address");
+
+    client = enet_host_create(NULL, 1, 2, 0, 0);
+    deerith_client_assert(client, "connect_to_server failed to create host");
+
+    client_peer = enet_host_connect(client, &eaddress, 2, 0);
+    deerith_client_assert(client_peer, "enet_host_connect failed on connect_to_server");
+}
+
+int deerith::init_network()
+{
+    if (enet_initialize() != 0)
+    {
+        deerith_client_error("An error occurred while initializing ENet.\n");
+        return 1;
+    }
+
+    return 0;
+}
+
+void deerith::shutdown_network()
+{
+    enet_deinitialize();
+}
+
+bool deerith::wait_till_connected_to_server()
+{
+    ENetEvent event;
+    if (enet_host_service(client, &event, 5000) > 0 &&
+        event.type == ENET_EVENT_TYPE_CONNECT)
+    {
+        deerith_client_info("Connected to server");
+        return true;
+    }
+
+    else
+    {
+        enet_peer_reset(client_peer);
+        deerith_client_error("Failed to connect to server");
+        return false;
+    }
+}
\ 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
new file mode 100644
index 0000000..cb5fa54
--- /dev/null
+++ b/deerith_engine_server/src/network/network_internals.h
@@ -0,0 +1,9 @@
+#pragma once
+
+namespace deerith
+{
+    int init_network();
+    void shutdown_network();
+
+    void init_server(int port);
+}
\ No newline at end of file
diff --git a/sandbox/CMakeLists.txt b/sandbox/CMakeLists.txt
index cddda04..d079a58 100644
--- a/sandbox/CMakeLists.txt
+++ b/sandbox/CMakeLists.txt
@@ -23,11 +23,21 @@ target_link_libraries(SandboxClient
         DeerithClient
 )
 
+target_include_directories(SandboxClient
+    PRIVATE
+        ${CMAKE_CURRENT_SOURCE_DIR}/src
+)
+
 add_executable(SandboxServer
     ${SANDBOX_COMMON}
     ${SANDBOX_SERVER}
 )
 
+target_include_directories(SandboxServer
+    PRIVATE
+        ${CMAKE_CURRENT_SOURCE_DIR}/src
+)
+
 target_link_libraries(SandboxServer
     PRIVATE
         DeerithServer
diff --git a/sandbox/src/client/main.cpp b/sandbox/src/client/window.cpp
similarity index 100%
rename from sandbox/src/client/main.cpp
rename to sandbox/src/client/window.cpp
diff --git a/sandbox/src/client/window.h b/sandbox/src/client/window.h
new file mode 100644
index 0000000..ed5976d
--- /dev/null
+++ b/sandbox/src/client/window.h
@@ -0,0 +1,3 @@
+#pragma once
+
+void execute_window();
\ No newline at end of file
diff --git a/sandbox/src/common/main.cpp b/sandbox/src/common/main.cpp
new file mode 100644
index 0000000..48cfea2
--- /dev/null
+++ b/sandbox/src/common/main.cpp
@@ -0,0 +1,24 @@
+
+#include <deerith/core/core.h>
+#include <deerith/core/log.h>
+#include <deerith/engine.h>
+
+#ifdef DEERITH_SERVER
+#include <client/
+#endif
+
+#ifdef DEERITH_CLIENT
+#endif
+
+int main()
+{
+    deerith::init_deerith_core();
+
+    int init_result = deerith::init_window();
+    if (init_result != 0)
+    {
+        return init_result;
+    }
+
+    deerith::shutdown_enigne();
+}
\ No newline at end of file