Graphics are quite likeable, however gameplay-wise there was some sloppiness:
- It seems turning around modifies hitbox as some times I would get hit when I turned away from spikes. If you are using sprite-based collision consider trying out traditional box-shaped hitbox.
- When jumping just before dying the guy would jump upon respawn. Try waiting until space has been released.
- S drops down, but down arrow doesn't.
- Menus are controlled with mouse but in-game is keyboard only - logical would be to control menu with same controls as the game itself.
- First level is way harder than second and third - maybe try easing players in before they quit in frustration.