Thanks! I do still think there's a little bit of potential here, but motivation has been low lately.
I think that your crash could be related to this Bevy bug. It looks like the bug was fixed in Bevy 0.14, which I've already upgraded to, but haven't released here yet. If you're able to build from source, you might be able to confirm. It's cool to hear that the game works on linux at all though, I have no way of testing it.