Keep it Steady

A ball rolls on a seesaw. Keep it centred — that is the whole job, and it gets impossible fast. Every few levels another seesaw lands on top of the last ball, until you are balancing five tiers at once and can only steer the bottom one. Everything above hangs off your hands: every move down here shifts the pivot up there. Hold the balls near the middle to build a combo up to ×5 and multiply every point. One slip and the tower comes down.