Press Enter to focus a square in Pack mode. Use the arrow keys to move it, hold Shift for larger moves, use Q and E to rotate it, and press Escape to return to the stage. Space controls playback when the stage itself has focus.
Compare repeatable packing runs with a fixed physics budget. These browser results are exploratory; export a ledger to keep the exact plan and outcomes.
| Seed | Status | Packing | Side | Stationary |
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Replay and edit a packing trace, or return to the catalogue for record-to-record illustrations. Positions are square centres; angles are radians.