I was able to get it to run on Linux by setting Diorama LINUX.html.x86_64 to executable (i.e. `chmod +x Diorama\ LINUX.html.x86_64`), depending on your DE, you can probably also do something like right click -> permissions -> "Allow this file to run as a program"
As for my experience playing the game, it was definitely unexpected to see a light horror game in this Jam! I was a bit confused on how to actually play, but enjoyed the interesting use of the theme. Good job :)