You are the cute little alien hero. Move using the mouse. Be quick! Touch the friendly green aliens. Each one gives you 1 point. Avoid the red "meanie" aliens. Each one you touch takes 3 points. Score 20 points to win and save the universe! Score -20 and you lose. Click the green flag to start.
I used 'Circle Wars' from "Coding Games in Scratch" for the inspiration for this game. Alien, earth and spaceship graphics were all taken from the internet.