So sorry about that, and thank you for playing that long! Your report found a real bug: right above the Weaver, between the Cocoon hall and the Dovecote, holding a direction could bounce you between the two rooms forever. Each bounce reloaded the room until the browser's graphics gave up, and that's what the "WebGL2 is missing" error means. It's fixed in 1.1.1, which is up now.
Your progress should still be there: the game autosaves every time you enter a room, and the web version keeps the save in your browser.
To get the game running again:
- Fully close the browser (all windows) and open it again. In Chrome you can type chrome://restart in the address bar. A page reload isn't enough: the browser keeps WebGL off until it restarts.
- Open the game page in the same browser and press Continue. You should be back near the Weaver.
If the WebGL error is still there after a restart, check that hardware acceleration is on (Chrome: Settings → System → "Use graphics acceleration when available"). If the save really is gone, tell me and I'll see what I can do. Thanks again, this saves the next player from the same trap.