Toggle the selected light and its four cardinal neighbors to turn every light off across 18 boards. Aim beyond a clear for PERFECT CIRCUIT by matching the minimum press count, PAR.
Choose a cell with WASD and press RETURN to flip its cross. Marks preview every affected light. At an edge, cells outside the board are ignored.
Directions work on the keyboard or pad; the pad button also acts as RETURN. SPACE opens confirmation to restart this stage. NO is selected initially. Choose with A/D, confirm with RETURN, or cancel with SPACE. Play pauses during confirmation. CTRL+C returns to BASIC.
Each light narrows, shows its edge, and opens on the opposite face in a five-stage flip. Sound and motion spread outward from the center, and the whole affected cross is previewed. Wait until the animation finishes before pressing again.
PRESSES is the number used, REMAIN is what remains of a 60-press allowance, and PAR is the board's minimum solution. Pressing the same cell twice restores its previous effect; use that property to reason about combinations.