Great game, went over 90 strokes I think this concept may evolve in a full game, just needs more polishing Also, while bullet hell involves a lot of skill, here I felt overwhelmed with attacks(and yet there was not as much bullets as in, say, touhou). Gave it a few thoughts as to why I thought I'm losing control over the game, and I think the chaotic nature of attack directions is a cause. Maybe try to systematize things: bullets should come from 1 direction(which? depends on level), trying to make player run away from bullets, but the higher level the harder it(going right through a bullet hell?), give some kind of a second chance(if player is nearby a bullet a fast swipe in a small time window will let you avoid bullet) I thought about the concept and how to improve it more than I should, and if your idea makes other people think about it, that might mean it was a great idea. Wish you the best luck, keep working!