Oh no
Can you post a screenshot of what that folder looks like in Finder? Hopefully it's just a simple problem with filename case or something...
Ok, this is because on MacOS, the games are packed into an .app executable folder.
Luckily it wasn't too hard to fix, so I made a new release.
The fix has the bonus side-effect that on Windows and Linux, you no longer have to remember to go into the 'Resources' subfolder for Thimbleweed Park.
It also displays Delores .yack and .nut files, since I was messing around with that anyway so might as well release that while I'm at it.
I should have caught this issue sooner, but I was testing on my MacOS VM with files copied over from Windows. Now I actually installed the games on MacOS, so my testing will be more accurate in the future.