Egress: Gravity & Escape

A box full of blocks and bubbles. One door. Rotate to empty it.

Blocks are heavier than air. Bubbles are lighter than air.

Pieces can only escape through the door on the top or bottom wall.

A block on top of one bubble drags it down — they fall together.

A block on top of two bubbles gets lifted up — they rise together.

Clear the box in as few rotations as possible.