About Alien Sort

Alien Sort is a fast sorting game. Aliens land one at a time and a rule at the top says who goes where — "3 eyes go LEFT", "purple aliens go LEFT", "aliens with a hat go LEFT". Look at each alien, decide, and tap the door. The rule changes every five aliens.

How to play

1. Read the rule at the top.
2. Look at the alien: eyes, colour, hat.
3. Tap the left or right door.

Tips

Check the rule again each time it changes — the old rule is the easiest way to go wrong.