Yep, noticed that after finishing lvl 3 or losing, the enemies will come back. It comes with practice and messing around, that's how I did some of my stuff, just got an idea, then messed around with the code in all sorts of ways and searched different solutions for the same problem to see if it is good enough. And let's be real now, any negative criticism is welcome, more so than saying the game is good and stuff. (Cloud)