This could be fun when multiplayer is added, for now I like the ricochet of the bullets it is kind of fun to just run around and shoot, but when the bullets ricochet they never disappear so you end up with huge amount of bullets flying everywhere, maybe have the bullets disappear after couple of collisions. The gravity is probably too low so the jumping is very floaty and there is an issue where you get stuck on the edges of the platforms because of the friction.
Sorry for being late, I somehow missed your game in the e-mail.