Hello @Seew9 , My project is currently progressing slowly. The good news is that I have already fixed the worst cause of the laggs and FPS breaks. The cause was that the engine itself had not correctly deleted the entities from the scene, which resulted in the list of all instances becoming fuller and larger. This mostly happened with audio files that should normally be deleted after playing. I wrote this function manually in this project and most of the entities then disappear completely. Unfortunately, updates to this game engine can lead to unexpected behavior like this, which in this case requires a revision of the code. I have currently tested 4 levels and they currently run at 55-60 FPS (without video recording or music with reverb, which my RAM also slows down). In the coming days I will show a fixed version of level 4. I would also like to adapt this project so that this game runs on both Windows and Linux. I will also make adjustments so that the game runs on slightly slower and older computers.