I like the art style. The jetpack gameplay reminds me a bit of Alien Carnage/Halloween Harry.
What I'd change is add some minimal ammo regeneration to the game. I found myself out of ammo and unable to progress at some point.
Thanks for the feedback! I was worried about running out of ammo, so I did add a 15 second respawn to the ammo. Next time I’ll work out a better solution or think about switching it back to unlimited ammo.
