Create. Enter your handle, pick a preset (Quick: 8x8, three ships, three volleys, about four minutes; Classic: 10x10, five ships, five volleys), hit create. The dashboard pops with your room code and copy buttons for the join link and the overlay URL.
Place ships. Tap to place, tap again to rotate, drag to move. Lock in when happy.
Open the volley. The countdown starts and the exact-count heatmap builds live as chat pins. You see precise numbers; chat only ever sees a coarse glow.
Fight back. One action per volley, each once per match: shield a cell, drop a decoy, or reposition an untouched ship. Play it late for maximum betrayal.
Lock early or let it run. The volley locks itself at zero, or you can slam it shut early when the heat looks survivable.