When it comes to dodging games, the most common are probably when you move in a circle or a line. So I thought, "Why not both?". Use the Left and Right Arrow Keys or W and D to move left and right. Don't let the green circle hit the colors red or blue!
Music is "Paradise on E" by Bounc3. You can find it here: http://www.newgrounds.com/audio/listen/26209 I had to cut around a third of the song to prevent lag, so I suggest you check out the full version. Font is Corsiva from Google Drawing Uses the "stop button detector" found on the Scratch Wiki: https://wiki.scratch.mit.edu/wiki/Action_After_Stop