This is fun! Props to your tutorial. I think the only thing that wasn't clear was the cd for the heart recharge (I was trying to press C or D instead of the UI button haha) and the "E-Cage" for the elites which I think just works like a regular cage? But really cool idea. I wish there was more to it since its pretty fun haha. Being able to place more cages would have been nice. Maybe you could do more with having mechanics that care where you place enemies and spawners? or making it so you loop the hero through the level over and over and can make changes between loops? Then you have to make it just hard enough to where he doesn't die but gets max xp. But still what you have here is quite fun! Great job!