I'd like to see the base critical chance reduced to 0% and the 95/90% to hit attacks upped to 100%. Then you could save the misses for attacks that are really supposed to be inaccurate, and the crits for attacks where they belong. 'Super-accurate' attacks could go past 100% to to resist debuffs.
Hard but good. I've solved lvl 4, but the game isn't recognising it. Giving it 3/5 in anticipation of a fix.
A fancied up future version that implements some of the suggestions from the comments below could be a 5 star game.
Final boss fight isn't very good. I just stood on the ledge above his head and shot him whenever he walked past; didn't get hit once - didn't even see him attack once.