Appreciate the comments!
More music tracks will be added down the track. We're going to experiment with interactive music that changes according to the development of your civilisation. More on this later...
Obsidian is removed in the next update because it confused some players, and also to make room for another new resource. Luckily, nothing is set in stone, so we can always revert back if the changes aren't good.
We'll have a think about darker UI. Can't promise anything on this yet.
We've updated the house and made it "bulkier" after reading your comment. You'll see it in the next update. Thanks for the feedback.
We haven't started localising yet, but when we do I'll keep you in mind. Thanks!