5 stars: Very addictive, great physics, worth the download!
4 stars: The game is really fun. But there are a lot of ads. They can usually be fast forwarded though.
4 stars: Wish there weren't ads after every single round. Double coins or not.
4 stars: Bit easy at first and a little repetitive but as challenge increases so does the enjoyment.
5 stars: Good game, not very challenging.
5 stars: Challenging with excellent graphics!
4 stars: fun, simple, and very challenging still. Lost a star for too many ads. i dont mind some, but after EVERY level and if i go to another app then come back to the game you have to watch an ad. Even if you only have to watch 5 seconds it's much to frequent!!! A 30 second ad every 5 mins or so would be plenty...
5 stars: Very fun and addictive hard to put down
5 stars: very good brain teaser with some smaller bugs like when I carry a cog I can't see from my finger where. And when I wanna take cogs from repository I can't always take a cog . But I hope that resolved in next update. Overall highly contagious game that I love very much..
3 stars: I really like the game, but the ads are ridiculous. after every round? stop trying to force people to pay for ad free games!
5 stars: A real mind tester. Starts easy but gets harder. Fast time waster. So up for the challenge then down load. You can play anywhere... 5 Star
5 stars: i find it relaxing, sometimes it also makes me really think and get those brain cells ...