Oh, all right. But an .exe file can't be played online. Your archive needs to contain index.html and the associated directories. You can offer the one with the .exe for download.
Looks like the game is trying to load a file from disk instead of its location on the server?! Maybe an absolute file path was forgotten inside the source code.
No. I mean one of the file paths in the game appears to be absolute, referring to a file on the creator's hard drive, rather than relative as it needs to be so it can be loaded from the server.