Oh, I'm not even sure whether our game is playable on Chromebook, I might have to consult with our developer on the matter. If Chromebook can natively run Android apps, then your best bet might be using Android installer instead of trying to play Windows version, because there might be some compatibility issues. I'm not that well-versed when it comes to Chromebooks, so it's hard to give a decent advice, though we'll look into it as soon as we have time.
You can Google whether someone had similar problems with other RenPy games, because generally they all work the same, so if someone figured this problem out with another game, their fix will most likely work for you too.