I can see quite a few people deciding that this is far too frustrating and uninstalling the game while simultaneously throwing their Windows Phone against the wall, because not everyone is going to have the spatial skills that would make this an easy game to play.
I'm just about there, but with the spinning requiring quick reflexes to hit the target squares, coupled with the time limits, makes for a quick moving game. Yes it's all against the clock - just thirty seconds to do as many as you can, although you earn a second or two back when you complete a pattern. Frustrating, fast to play, and fun in an evil way.
From the directory listing:
In Grid Wp8 you'll answer by your finger as fast as you can. As the level up, you'll face mirrored pattern, fade pattern and rotating pattern. So come on, chanllenge your brain and train your brain.