Very fun gameplay! After getting the time jumping mechanic down, I thought it would be easy enough. However, the concepts of shooting and crashing into yourself made it challenging! I did manage to win after several attempts.
I agree with the post below that a smooth transition between frames would do a lot of good. With sounds, more polished graphics, and perhaps a few more levels, you could make this into a nice, full-fledged game.
Great work!