The phone is the seesaw: tilt it to keep a ball on a pivoting board while scheduled gusts, shifting friction and a constant slow drift make every resting position unsafe. Endless runs get a fresh seed, while the Daily Balance hands everyone the same seed for the day and ranks the best survival time. The physics is a hand-written fixed-step simulation rather than an engine, so every ranked run can be replayed on the server before it is put on the leaderboard.