it is a taiko player, but it is not done yet.
it only supports .osu file format for now.

place the audio in the left file input and the notechart/beatmap in the right file input. then click "go" to load the files. to play hit [`] (Tilde).
reset will restart the map.
autoplay will toggle autoplay. same with character and hit sounds (they'll toggle what's on the label).
"set controls" and "set resolution" will have instructions with them.
to change the music volume press [-]/[+].
to change the offset, press [Shift] + [-]/[+].
fullscreen will fullscreen...

it runs like garbage on firefox/gecko-based browsers. use a chromium based browser (maybe ungoogled chromium? or vivaldi?).

click to play