This is the itch game page in question: https://cosmicadventuresquad.itch.io/deepest-sword
I noticed if I'm using regular chrome, the page loads fine, but if I use an incognito window it fails.
I've noticed some of my other games also have this problem, but not all of them. There doesn't seem to be anything immediately out of place looking at the console log, though it seems like in incognito the game just doesn't initialize at all. Not even the loader appears.