HUUUUGE fan of the pre-rendered style, such a cool look that you don't see a ton of anymore! The game itself gave me metal slug meets earthworm jim vibes, which is always a plus. If anything, I feel like maybe the slimes were a little hard to shoot, it felt like the angle i expected the bullet to come out from never matched where it actually came from. I also felt like you could totally get away with cranking up the damage numbers a tad, cause I was able to tank through just about everything. The boss fight was fun, too. That slap move had me quaking in my boots lol!
All in all, Great work!