Two keys each. One screen. Don't touch anything, outlast everyone.
No account needed. Pick a name and jump in.
Press a player's left key to join, right key to leave. Bot fills the seat with a computer player. Click a name to rename, a key to rebind, the swatch to change colour.
The host picks these.
The tile colour tells you who it hits. Click one to switch it off. Timers show next to each name while a power-up runs.