I went back to previous levels to try and get more stars. On Level 147 (I think it was), I completed the level with 40+ moves left! and on Level 168 I completed it with 30+ moves left. I was surprised in both cases that I got only one star despite the number of moves left. I thought I would get at least two stars in both cases. Perhaps the requirements for stars should be re-examined?
I'm currently at Level 314, which may well be the level at which I quit the game. Whoever designed it is truly insane! My compliments!