It's very addicting, with neat soundtrack. Even the simplest games can be one of the best. Only problem with this game, and the other game the SPACE that I have encountered, is that the game is not self-explanatory in some areas. I don't know how to unpause. It tells me, hold to resume. Hold what? I hold click on everything on the screen and nothing happens. It also would be more clever to add a ''play again'' or ''restart'' button whenever someone loses, rather than having to refresh or collapse and uncolapse the screen.
Verdict: 4 stars
It's playable and addicting but add a pause, restart button, and better instructions.