Eat circles smaller than you to grow. Bigger circles kill on contact. Reach the exit once you’re large enough to enter it. Some circles run, some chase, some split, and some shrink you on contact. The pre-level dialog calls out anything unusual.
After clearing a level, hit the Challenge a friend button on the solved screen to copy a link. The recipient races against your ghost, but they must have unlocked the level on their end to accept.
Your progress (completed levels, best times, and ghost recordings) lives in this browser’s localStorage only. There is no account, no cloud sync, and no way to recover the data if it’s wiped. It will be lost if you:
If those numbers matter to you, screenshot the Stats panel or write the best times down.
Send a link with your run\u2019s ghost. The recipient must have unlocked this level to accept.