I think I know what the problem is. Bonbon has an installer, and I've never thought to test it with the app. That was remiss, sorry! Thanks for pointing that out.
I'll make a version that works with the app, but it'll take a few hours.
If you don't have time to wait, you can grab the installer on the website in the meantime: https://aethericgames.itch.io/bonbon