Goal: Shift tiles into order. Tap tile next to blank — it glides.
Moves: Moves / Optimal below board.
Tokens: ↻ 75 • ◎ 25 • ◑ 150 • ↺ 125 + prime ramp 2%,3%,5%…
Score: 5000 + time×10 − (moves−optimal)×15 − assists. Grid ×1/1.5/2.2
Pause: Tap clock → Resume / Quit