Right arrow key is to go right, and left arrow key is to go left. Your goal is to catch as many crabs as you can. You start with 20 lives and a score of 0. Click the drums to change the volume (sorry if you didn't like the fact the music of was sound and music on was the drums plane. It was the only way I could mute it and unmute it.).
Tell me in the comments what score you got.