First Impressions: The art is quite cute, the only thing that didn't quite feel as great as the rest was jumping - the animation and the airtime. Music was cool, especially if you made it yourself!!
Constructive (honest) feedback: Bullets should probably move faster than you. The time slowdown would maybe feel better maybe if you slowed down your audio too - you could adjust the audioclips pitch in order to get a slow down / speed up effect. Very short game without much of a challenge, but it was cool and nice foundation you can maybe expand on!