It's not a Comic Sans derivative, it's Patrick Hand. Literally just some guy's handwriting. Hating on Comic Sans (and derivatives) in this age became a meme because people use these silly comic fonts for serious non-comic uses. But this game is literally rendered as a comic strip. What else are we gonna use?

We are in full compliance with http://comicsanscriminal.com/

Can't you just change it yourself? Change the stylesheet in your web browser.

You can also code the entire game in your web browser yourself, but that wasn't the point of the comment.

That's true. At the same time, what if everyone requested the creator to change the font of their game? I don't have a problem with it at all, i was just thinking maybe for a simple change like the font it would probably easier just to do it for yourself.