Use the up and down arrow keys to move, thats it really. Get to 100 points to win the game. If you get -100 or your precious 120 seconds are up, you're going to have to try again. The 3 coloured balls (Green, pink and red) give you points if you hit them but minus points if it hits the green line. The ball with the white X gives you minus points if you hit it but extra points if you miss it. So, have fun!
This is my first game. Anyway I'm planning on making better games than this so just keep playing it until you get tired!