Added unit tests

main.c

@@ -25,12 +25,21 @@ int main() {
 
   SetConfigFlags(FLAG_WINDOW_HIGHDPI);
   InitWindow(WINDOW_WIDTH, WINDOW_HEIGHT, "2048");
-  SetTargetFPS(30); // So my laptop doesn't burn
+  SetTargetFPS(90); // We have event blocking so we can affort higher FPS
+  EnableEventWaiting();
 
   while (!WindowShouldClose()) {
-    ClearBackground(RAYWHITE);
     BeginDrawing();
-    render(&game_state);
+    ClearBackground(RAYWHITE);
+
+    // If we are not animating, we can wait for input events instead of continuously rendering
+    bool animating = render(&game_state);
+    if (animating) {
+      DisableEventWaiting();
+    } else {
+      EnableEventWaiting();
+    }
+
     EndDrawing();
     handle_mouse_input(&game_state);
     handle_keyboard_input(&game_state);