That's weird. Most people have been able to use Proton to run the game. I'm not sure if I can upload a Linux build as per jam rules, but I've got other people to try it and Proton does work for them.
Viewing post in Chessoban jam comments
Now that all this was cleared, I had a moment to play it, and it's a great game.
I fully understand why the higher levels don't have different maps for the various difficulties, but also found that solving The Bridge (again) didn't register for higher difficulties...
At first I didn't see that there are a few more levels, so some indication like a scrollbar or arrows pointing down (and up if the view is showing the higher levels) would be useful. And an "official" Quit button couldn't hurt ;)
(Also "Back to Menu" and/or "Restart" for within the level)
But that is small stuff that's easy enough to add for an update :)
Hey, thanks for coming back to play it! Yeah, the Bridge can be fixed easily but I forgot to add a single script handling that stuff to the level in my last-minute panic. A scrollbar or arrows are a good idea, I'll definitely be adding them if I ever plan on doing a post-jam version, as well as the buttons for within the level. Thanks for the feedback too!