Pick a square. Grab the golden orbs. You accelerate the longer you hold a direction — turning or hitting a wall kills your speed. Orbs are +100, smashing a mad square you're faster than is +25, slamming a wall is −10. Touch a mad square that's faster than you… game over.
Connect directly to a friend — no server, so you each share one code: the host sends a match code, the joiner sends back a reply code, done. Ram your opponent at higher speed to shatter them (+1) — first to 25 points wins!