Holy Crap! That was awesome!
I was mind blown the moment everything made sense to me. I think this also goes with the theme "Makes Total Sense" once you understand why you have to heal as well. Loved the core loop that evolved out of it once you get the hang of it too. Mental math + arcade-y action was pure catharsis!
I feel like the camera should move a bit towards where you aim as I often found myself unable to see where I'm going when I move downwards but that's really the only gripe I have. I also loved the little things like how the enemies get pushed back when you shoot them, how you made the levels progress so players learn naturally, etc.
Awesome submission!