I think this is a pretty cool idea, but it's just too difficult to play right off the bat. The notes came too fast, the shapes were too complicated to match right away, and like The Data Boys said below, trying to match a square shape with a linear set of inputs is confusing. Although I don't agree with the WESD input they suggested - that might make more sense logically but I think trying to actually press all those buttons at one would be fairly difficult. How about turning the shape 45 degrees and using a conventional WASD / arrow key input?