The game starts a little fast-paced. Anyone who hasn't played Zuma and doesn't know the concept of the game will easily fall behind on the first level, which might discourage people from trying to progress through it. If you made the game ease people in for the first few levels, I believe this would be a 4-4.5 star game.
The music is good, the graphics aren't bad, and it is very similar to Zuma. All in all, this certainly wasn't the worst game I've played this week.