I think the first boss was a bit too spongy but the second not enough haha! I like the game though it was fun to play :) But I had the running out of weapons game over which honestly miffed me a bit.. I would recommend maybe a melee attack that's just used to lop off a enemies weapon when you need ammo just so you dont get a game over ... Like a high risk high reward type attack!
I also really liked the background! You all used simple geometry to create interesting shapes with interesting colour and lighting!
Anyway though really good effort :)