Scenarios

plays 5713 / votes 4

Adventure on every axis.

plays 3225 / votes 1

Fun in red and blue.

plays 5387 / votes 0

Not really invisible, but semi-visible isn't as catchy.

plays 2387 / votes 0

Use your ninja moves.

plays 10471 / votes 2

Destroy 100 little asteroids without getting hit!

plays 2442 / votes 0

A game of Chance

plays 4312 / votes 1

The firing squad synchronisation problem using cellular automata