I really had a hard time figuring this one out, and before I did I gave up. It was simple at first, just move everything over to one side, but once you had gaps, it would never give the yellow star to continue. If the game is only about moving things to one side of the screen, then it's less than thrilling, but if I could figure out how to get the yellow star to light up once I start having gaps-- it just might be an interesting puzzle game. I am not a huge fan of games that take this much effort just to get started. Perhaps a couple of step-by-step tutorial rounds would be nice. The instructions on the separate tab were just a pain to remember once playing started.