I called it quits when I was unkillable. Over 3300 combo, final score of: 5256571240
Wings + Health Upgrades + Damage Reduction + Vacuum = unkillable at end game
ok, I call BS on the physics.
As soon as I saw any sway, I stopped dropping pieces. It kept getting bigger and bigger, without me shaking the tower with pieces. Then the entire tower fell over leaving only the base.