Okay I see, that's my bad. I tested on 1080p screen and 2k screen like you mentioned but I was seeing the same issue. Other Godot projects I played didn't have this issue so I assumed it was dev mistake. Downloading the game resolved the scaling issue. Ill make sure to go through games earlier in the voting period and check different builds so potential issues like this can be sorted out before the end of the jam. I sincerely apologize for my mistake.
I`m not really sure what was the problem, i just tested it in the desktop version and it worked fine, and didn't got to test the web version much. Also, i have some things like that text in autoscale mode, so these things appear full screen, but other things are just sprites and appears in a smaller size. I would have to study how the web exporter works