We are a few players waiting for a stable new version for grinding speedrun again at speedrun.com ! https://www.speedrun.com/Dragonsweeper
Thanks for making the original version still available so we can keep this category on the site.
Sadly, I can't seem to make it work with the downloaded files. On both folders I have the same issue:
Uncaught SecurityError: Failed to execute 'getImageData' on 'CanvasRenderingContext2D': The canvas has been tainted by cross-origin data.
Mentioned in the comments of the blog post, but you need to use an http server. (like python, Linux it's: python3 -m http.server).
I also mentioned a speedrun would probably be a lot better with the old version but new marking system (which maybe somebody could splice in if nothing else, though I guess be unofficial probably isn't great).