I really like the feel of this game, the simplistic style and the music are a really good match! The sound effects also fit well and are cool because of how they are recorded sounds. I think the idea is pretty cool and can easily be grown upon.
There are some bugs like the enemies being able to hit you through walls, and dying, but the game won't restart. but overall its a good game, especially for only 15 hours of work, holy cow! took me the whole week to make a level in a platformer hahaha.