You press the arrow keys to move. You have to try to kill the monsters to advance to the next level. Press m to mute music. 50 points is the winning goal.
I did this by myself. If the monster doesnt spawn click the green flag a few times. There is a 1 live chanllenge if you enter donut as a code by pressing c but you do get 2 points everytime. I wonder what the code poison does *wink* *wink*