Nice art I really liked the main menu drawing and player character, nice presentation, and cute music. I feel like this was a pretty creative interpretation of the theme. And I feel like this would be nice idea to expand into a larger game.
I did encounter a bug that would not let me progress past level 2, the end tunnel would just loop me back to the beginning tunnel. The spikes were fairly easy to see in large groups, but the smaller sets were much harder to see. For a last element of polish I would like it to take a little longer to die, it reloads the level almost instantly which makes it hard tell what caused the death. It was personally a little difficult to remember the space was not the jump control.
Requested Music Critique: (Asked my music friend what he thought) The baseline is pleasing and nice in the main menu, but the high pitch and high volume of the lead is a little grating and makes it hard to hear the baseline. In the main game the music was similarly nice to the main menu music, but without the lead sound interfering. (Speaker was a standard tv)