Local 2-player: Load a ROM and play — both players share this keyboard.
Online: The host loads a ROM, sets the player count in ⚙ Settings, and clicks Host. Easiest way to invite friends: click 🔗 Invite and send them the link — it pre-fills the room and player count so they just enter a name and Join (no file needed). The player count must match for everyone, which the link handles for you.
Pick your player & roulette: Open ⚙ Settings to choose which character you play, and (host) turn on roulette — Share passes one character back and forth, Swap (co-op games) swaps who drives each character on a timer.
Reconnect & save: The host auto-saves every 10 s and reconnects automatically on a drop. Use 💾 Saves for manual save states — online, the host loads one and both players jump to it together.
Player 1: W A S D · J=A · K=B · Enter=Start · L-Shift=Select — remap under 🎮.
Player 2 (local only): Arrow keys · .=A · ,=B · R-Shift=Start · /=Select
Connection trouble? If joining is slow or play is laggy, run 🛰 Test connection below — it checks whether your network allows the fast (UDP) path.