A tap-only logic puzzle prototype about clearing order: every arrow is blocked until the right ones leave first.
Each tile is an arrow. A tap checks the straight ray from that arrow to the board edge: if nothing blocks it, the arrow flies off; if another arrow is in the way, it bumps back and counts a mistake. Three mistakes fail the level. The portfolio build runs three boards (7, 14 and 16 arrows) with a run timer and a final summary.
Test whether the clearing rule reads without text and whether ordering stays interesting as boards grow from 7 to 16 arrows.