Great game! The art is amazing, the music fits, and the gameplay itself is a lot of fun. Nigh unplayable with a keyboard, at least in my opinion, but really works with a gamepad. I did find a little glitch, though. I died while going up the zipline to the train tracks. When I restarted the game, I was still on the train tracks and the Tom Fulp bot was up there with me now. His health didn't refill, but mine did. Just thought I'd point that out.
As for things I'd like to see in the future, maybe more playable characters?