Switched the engine to use a fixed delta in debug mode

src/GameEngine.c

@@ -136,6 +136,10 @@ bool init_engine(const char *game_name, WindowSize window_size,
   GameEngine.delta = 0.0f;
   GameEngine.last_time = SDL_GetTicks64();
 
+#ifdef DEBUG_ENGINE
+  GameEngine.delta = 1.0f / 60.0f;
+#endif /* DEBUG_ENGINE */
+
 #ifdef DEBUG_ENGINE
   printf("Game initialised successfully\n");
 #endif /* DEBUG_ENGINE */
@@ -726,7 +730,9 @@ void update() {
 
   // Get the delta time in seconds since the SDL_GetTicks64() returns the
   // time in milliseconds
+#ifndef DEBUG_ENGINE
   GameEngine.delta = (current_time - GameEngine.last_time) / 1000.0f;
+#endif /* !DEBUG_ENGINE */
 
   update_all_objects(GameEngine.object_store, GameEngine.delta);