Hey, I think you uploaded the wrong files. You uploaded the entire project and source code, when you should have uploaded just the executable and the .pck file. I do see that you have a Web export in there but the .pck file would be too big to run on Itch.io . So I would use the Windows Executable preset and then Zip the .exe and .pck file to let people download and play it.
I did load up the game and was able to play it. I thought that it was pretty good. The mechanics were pretty confusing at first but you did put some hints around the map that explained it a bit which was nice, and after I got the hang of them, the game was pretty fun. I could have used a little direction however on what I was supposed to do to escape. Overall though the game was fun and interesting.