You need to work on varying the way the stars are scattered. Every level can be solved by looking for the 'pointiest' part of the shape, and the just quickly flicking in that direction.
Don't ask me how to accomplish that though. Seems like it would take long enough to makes these as it is.
The structure of this game is the hardest part, you can see all the holes in logic but you can only get to them in a really indirect way, it's not intuitive