Keyboard: arrows = D-pad, Z = A, X = B, Enter = Start,
Right Shift = Select. ~ toggles the egui
debugger overlay. Select a .nes ROM above to
begin — audio starts on the same click (browser autoplay
policy). Check the devtools console for the boot log.
Touch controls: tick "Touch controls" above to reveal an on-screen D-pad / A / B / Start / Select (great on phones and tablets). Choose the target Port to route to player 1-4, or tick "Power Pad" for the 12-button Power Pad mat. Touch input is latched at the same point a keypress is, so it records/replays in TAS movies and netplay identically.
Famicom Disk System: upload the 8 KiB
disksys.rom BIOS via the "FDS BIOS" button (it is
Nintendo IP and is never bundled), then load a .fds
disk image. Press F9 to cycle the inserted disk
side when a game asks you to "insert disk side B".
emu.write) are gated during netplay.