Tested on Linux Firefox and Chromium and doesn't work.
Console show
Unhandled Exception - uncaught exception: { message : "undefined value in expression", longMessage : "undefined value in expression", stacktrace : [ "function _Vn("undefined value in expression")
","function _M5([undefined])
","function _J3([instance], [instance])
","function(0, 0, [instance], [instance])
","function(0, 0, [instance], [instance])
","function _Kf2(0, [unknown])
","function _rr3()
","function _1r3(14919.74)
" ], script : "", line : -1 } in file https://html-classic.itch.zone/html/17939885/html5game/GameJam_NES.js?cachebust=... at line 310 GameJam_NES.js:309:84