=currently known bugs=
There is an ugly hack that fixes the sound system break that caused weirdo 90s modem sounds. Just some duct tape until I fix the main culprit.
"C" is not fixed, nor is "A" - for any given tuning it probably is at a fixed frequency, but due to dumb design decisions on my part, it does flit around a bit between them. Luckily, not very many tunings "have" a reasonable 'A' or 'C' (these would be the meantones and hyperpythagoreans having reasonable "A" or "C" analogues, i.e. any temperament with keyboard layouts where the basic pattern is LLsLLLs, L being a white key followed by some black keys, and s being a white key followed by fewer black keys)
After fixing the sound, the next goal is extracting the level data into separate .json files to make this less of a bulky download.
After this, some cookie-based system of making persistent states available, followed by a way of entering the desired edo and level directly in the address bar. After this, a login system, a member database, and then maybe a keyboard layout editor and (definitely) a level editor are next in turn.
After this, a way of doing just intonation and overtone scales is next.