ThumbStir is a simple game to test your reaction time with a simple randomly appearing sprite. You get a point every time you press Mister iCan as he jumps about on the screen. If you miss, you will lose a point. If you hit one of the other sprites jumping about, you will lose 2 points.

The game can end one of three ways. If you are all thumbs and keep missing Mister iCan or hitting the other sprites, the game will end when you get to minus 15 points. The game may also end when you run out of time. Finally, the best way for the game to end is that you get to 50 points and get to see your time for your great achievement.

The challenge is simple. See if you can get to fifty points in less than 250 seconds. If you do, remember your time so you can challenge your friends! Be aware though! The background changes and the app speeds up every 10 points until you either win or lose.