It's simple. Put your finger on the line. Keep it there. Sounds easy enough and it is at first. The first few levels might seem like child's play. But wait, what do you do when the line starts getting crazier Is it speeding up Why are there so many peaks now If you make it past this level, just wait until you start the next one. Get ready to become addicted. It's the game you can play anywhere, for a few minutes, or all day. Once you start, you won't be able to stop.