Really great pick up and play game. Deceptively simple looking but gets hard as nails as you progress further into the levels. Sounds easy just tapping left or right, but the taps have to be done at the precise moment, and you have to adjust your tapping direction based on the way the yellow dot is facing. Think like you're driving an RC car or airplane and the controls flip while the thing is coming towards you. Takes practice but is fun and rewarding when you finish a complex level. Took me awhile to finish all 56 levels and can't wait for more...