Hey this was super fun, holy heck the gun was so loud!
I made it to level 5 but then my gun stopped doing damage to the enemies... not sure if it was a bug or that's just the end of the game. I shot them like 1000 times but they wouldn't die at the end.
Also, the shooting feedback was cool but there was no indication that I actually hit the enemies, I think a sound effect or a stun or something would go a long way.
With that, great job and I loved the music and animations :)