Controls and rules
| Action | Keyboard | One-button pad |
|---|---|---|
| Move; holding is supported | W/A/S/D | Up/down/left/right |
| Use a seal or anchor | RETURN | Button |
| Rewind early | SPACE | Use an already lit seal again |
| Return to BASIC | CTRL+C | Use the keyboard |
Use the button on a diamond-shaped seal or an orthogonally adjacent cell to light it and open the door at the room's right edge. Reusing a lit seal rewinds early. The clock-shaped anchor at each room's entrance is a shortcut to the first room whose seal is still unlit.
Running out of time or touching a trap returns you to the first chamber. Seal progress remains, while the clock and your position reset. Lighting the twelfth seal completes the game. Returning to the title and starting again also resets the seals.
The display shows seconds remaining, a thick time bar, loop count, room number, and the state of all 12 seals. Warning sounds begin at three seconds remaining. The clock continues while you wait, move, and hear sound effects.
