FYI I get errors trying to run this in Safari. Appears to be due to CORS issues.
[Error] Blocked a frame with origin "https://slash.itch.io" from accessing a frame with origin "https://html-classic.itch.zone". Protocols, domains, and ports must match. (x2) [Error] Failed to load resource: the server responded with a status of 403 () (Vec.js, line 0)
Looks cool, though! Especially like that cover art.