I got the same bug about all the buildings being pitch-black inside, and if I try to proceed nonetheless, the game crashes when trying to enter the tunnel in the starting town. It says a file can't be found (can't remember precisely, it was about some MIDI stuff not being there or something?). I tried to play the game with Wine on a Mac, don't know if that's the problem. It's a shame not to be able to play it as it looks really cool and I absolutely love the starter choices! (Speaking of which, it would be amazing if in a future update you could also get a Refrigerate Amaura, maybe so that the starters have a 50% chance of getting one of their two different abilities instead of it being predetermined. Snow Warning kinda sucks for team synergy unless you want to build a weather team. Well, not that I ever got to the starters anyway but... still.)