Hey jeremyb, congrats on your first game jam submission. Well done for getting a game out the door and ready to play!
I really liked the spray mechanic and the fact that theres tradeoffs between using each attack.
For improvement, I'd suggest making some more levels because it is very short at the moment.
Also, one of the criteria was Music/Sound, and because your game has no audio I can not give you points in that area.
Keep making games and honing your craft!