Hmm... If it happens at random and not in a common part, then it must be something to with your phone and newer ren'py versions. Not really something I can fix, sorry.
I have an ongoing visual novel project and wanted for a long time to have something like that as a minigame for one of the girls in it. Even tried creating one myself (was able to, to some degree), but yours is much superior to whatever I had made!
That being said, I have a kind of suggestion, kind of request to make... Is there a possibilty to have the notes assigned to lanes during the beatmap creation instead of during runtime?
I actually have those features planned since I started writting the story and, yeah, you pretty much nailed everything that will be in game when the inn starts working. That being said, I still have to develop characters and set the world background before getting into the hotel management aspect of the game.
The current content for the game ends there, yeah.
The Inn is undergoing a total rework of it's base code to acomodate more features and make it easy for me to add more content later on. While I can't give an ETA of when the next update will be available as I don't have a set schedule (The Inn is not the only thing I work on), I can say that I'm on one of the final stages of porting the old content over to the new format.
