Thanks for the positive feedback! I will definitely be adding tons more levels and more obvious tutorials for the various mechanics. Right now the 4th level only functions as a demonstration of all the current features in the game (this is also why the 4th level might run a little bit slow on some computers, since there is a lot going on). Can't wait to get this thing out to you guys. By the way, does 30 levels sound like enough for the full release? That's what I'm shooting for and I can always expand on the concepts in LMB2 if this is popular enough!