The art is charming and this is a good start for a game!  I'd add some sound next.  Maybe modify the acceleration so the player reaches max speed quicker and slows down quicker.  Since this is a game about avoiding things, responsive controls will be a must.

If you would be so kind, head over to my game and give it a try!  And don't forget to rate it and tell me what you thought could have been better about it!  Thanks!