Test your reflex against time in two challenging modes.
In Classic mode, simply touch the lowest white tile. As the tiles shift down, touch the next. You have to be fast. Get 60 tiles before :15 expires and an additional :15 is added to your clock.
In Insane mode, you play exactly like Classic mode but as tiles shift down, the white tiles shift left or right. Get 32 tiles before :15 expires and an additional :15 is added to your clock.
In both modes you can utilize Rescue Points to resume if you miss a white tile or run out of time. A Rescue Point will allow you to continue from where you left off.