Light-walls stay solid and lethal forever — but they fade to invisible ~1.5s after
you draw them. Your only sonar is a turn: every direction change pulses the whole grid,
flashing all walls back into view for a heartbeat. Turn to see. See to survive.
First to 3 rounds takes the match.
USER0ROUND10MCP
GHOST WALLS
Steer the cyan cycle. Walls vanish from sight seconds after you lay them — and still
kill on contact. Change direction to ping the grid and reveal every wall for an instant.
Box in the orange MCP cycle before it boxes in you.
STEER ←↑↓→ / WASD
· SWIPE ON TOUCH · R RESET ROUND ● each turn = one grid ping