That application is all about recognition shapes and putting them on right places.
App generates simple polygon maze and expect you to put presented polygon piece on proper place.
Your performance measured as milliseconds and recorded as best time and average time.
You can move polygon pieces by dragging your finger on screen and turn them around themselves by dragging your fingers on bands on both side of screen.
Beware, in case there are two or more identical places on screen, piece you were controlling fits only one of them.