I give you 4.5 stars. Why? I liked the game mostly but could not beat it. I couldn't figure out how to get out of the 2nd to last tunnel. I couldn't jump out of the top and there was nothing matching the bottom pieces, so I got stuck, with no where to go. And the timer ran out.
I have to say, it was very frustrating that there were pieces that seemed to "fit" but then when you tried it didn't actually work. Someone else has said that already, I'm sure.
It would be nice to have the ability to save your game and not start all over again. What if you do really well and get all the way til the last thing and still have a minute left..... I don't like having to start all over again. In fact, I will not be finishing the game, I'm too frustrated and I've tried too many times to get through that last bit, and after getting stuck.... bah... not worth it. :P