That's strange, as I haven't done anything different from the other games I put on itch! It's just a zip archive with the files in it, there's nothing to install, you just run an executable.
I have never used the itch.io launcher myself, so I don't know what's wrong with it. I'll give it a look in the next few days.
So, I tried the launcher and it worked well for me. It asked me which executable I want to run (the game itself, or the setup) and then I could just play. If it still gives you trouble, maybe try changing some of the options in winsetup (resolution, etc.).
Also, I've just updated the game, so maybe this version will work for you?
I don't know, it's a bit difficult for me to understand what's the problem. Was there an error message?
The game is working now, sweet.
I found a post in tich.io forum with the same error I use to get. I had the same error and the install " dropbox" wasn't available for me either.
https://itch.io/t/1112356/cannot-read-property-build-of-undefined-error-when-try...
