Turn your phone upright
Roll up the world. Everything sticks. Nothing is out of context.
A fan-made homage, rolled together by Claude. Original code, original music, no assets from the real game.
Two katamaris in one world. You can see each other rolling around, and anything either of you picks up is gone for both of you. Nobody can roll anybody else up — there is no way to get in each other's way at all.
Worth knowing first. This connects your device straight to your friend's, the same way a video call does — so each of you can see the other's IP address. There is no server holding the game, no account, no sign-in, and nothing is written down anywhere. Only send an invite to someone you would give your phone number to.
Or join with a room code:
Pick the one you will both roll. Your friend does not choose — the invite carries it, and their game loads the same world from it.
Prefer buttons? Options → Turning swaps the steering for on-screen ‹ › arrows, and Tilt range sets how far you have to tip for full speed.
No motion sensor, or you declined the permission? On-screen ▲ and ▼ arrows appear in place of RECENTRE and drive the katamari instead, and the ‹ › arrows come back to steer with. Everything else is identical.
Anything smaller than your katamari sticks to it. Every object you collect makes the ball bigger, which makes bigger things collectable. Long thin things can be picked up even when they look too big — they will make you roll strangely until you cover them up. Slamming into something huge at speed will shake objects loose.
The stage does not end when you hit the goal — it ends when the clock does, and the size you finish at is the size that counts. Once you have passed the goal you can press Enter to stop early and bank what you have. If you manage to roll up absolutely everything, the round closes itself.
Automatic picks touch controls on a device with a touchscreen and no mouse. Override it if you are on a laptop with a touchscreen, or want to try the phone controls on a desktop.
Tilt steering rolls the phone to turn, which frees your left thumb entirely. Arrows are steadier if you are lying down or on a moving train. Falls back to arrows on its own when there is no motion sensor.
Clears which stages you have opened, your best sizes and the collection log. Volume, camera and quality settings are kept. There is no undo, so it asks twice.