Has a lot of potential, but..
Good graphics, interesting idea.
Horrible controls.
I don't know how often I've been cursing out loud for "no dont dash FFS".
You need to make it a double tap to the right and/or double tap down to make it a lot more intuitive.
Also a continue mode or retry on the same level would really help on this.
After that you could allow, as a poster mentions below, some way to return to levels and collect all the stars on that level, plus some extra trophies for doing so.