In all seriousness I think it would be a good addition to the game, for debugging complex simulations which are not going quite right but need to go a bit faster than f...f...f...f
@Elpower(View Post) tpt.setfpscap(10) (for ~1/6 of normal speed) Warning: Also slows down menu and cursor updating, so it's extremely annoying to use the game while capped FPS.