Use the left, right, up, and down arrow to move in those direction. If you press two keys such as up and right than the rainbow will go diagonally. Also press the mouse to shoot. Enjoy. This is just a basic caterpillar thing. It a layout for game maneuvering.
Math Apps provided this maneuvering challenge (and some coding help) although, this is my own work. Not much to be proud of but I did it so yeah. (The background is from Google by the way) *Check out some of my other games too! *And if you remix, please give me credit.