The look of the game is pretty good. The models have a nice low-poly look. I think the movement needs a bit of work, though. The character moves really fast and jerky, and the jump is very floaty. A few things that might help:
- Hitting left/right should accelerate the player to their maximum speed over a short span of time. Might want to lower the top speed a bit.
- Increase the gravity, and the jump force. I just feel like I'm floating in the air for too long.
- I was getting caught on ledges as I tried to jump up.
- The camera movement is a bit much, in my opinion. I'd try adding a bit of a dead zone, and a smoother "pickup".
- I ran out of ammo on the very first enemy, and then just had to run past.
It's a good start, I like where you're going with it. Keep it up.