Hello! This game gave me an idea: imagine if your objective in the game was to keep the FPS from decreasing too much, then you would have to run through the level to lower the amount of objects on screen! I don't know if it's possible with the FPS extension of gdevelop, but you could try putting a condition that jumps to game over when the FPS are too low! Just a crazy idea, sorry and thank you for your attention! :D