The version number is in year/month/day format of the upload day, which means you're playing a version from November 2021 if that is the date shown in the title screen.
Gamcore is not an official upload from me. I don't know who updates it or how often they do it, but I doubt you can update the browser version yourself.
If you can find the save folder for the game with the .rpgsave and .global files on your local system, I'd be possible to download the game here on itch or anywhere else where I post it, and continue your progress by copying the entire save folder content to the www/save folder of the downloaded game version.