Kind of fun, but the game does become repetitive fast. Maybe more enemies, hazards and the addition of power-ups, a variable jump might help, maybe colors or skins you can unlock for the player. I read you got rid of the menu, I understand why, but maybe a simple ''press this button to start'' might help with the game presentation, you know, so you don't see your character constantly dying when you aren't playing xd.
I like the options to shoot and crouch, I think you could do more with that.