Slash through all the numbers that have factors. Avoid prime numbers or you'll lose a life. You have one minute and three lives. Scoring: For composite numbers, you gain the value you hit. For missing them off the bottom of the screen, you lose the value. For prime numbers it is the other way round. Hitting them reduces your score (and loses you a life) and leaving them increases your score. The game ends when you run out of time (one minute) or you lose three lives.
I tried using clones but found it too hard to keep track of two-digit numbers where each digit was one clone, so the screen is redrawn each frame using a stamp for the digits, the lives lost and the star trail. Credit to ABCYA.com for the idea. Unfortunately they want you to pay for their version. You may use and remix mine for free!
