Hey, thanks! I've definitely been thinking about music a lot. I always liked games that gave players some control over what they're listening to while they play, whether it's just more tracks or even being able to upload your own - I actually have been working on a bit of a modding framework because I also love games that allow mods and being able to customize music was absolutely one of the reasons I started thinking about how to integrate modding.
I also have been playtesting a bit with mountains and ejecting - I had the same thought about the mountains, and their imperfect and sometimes slightly unfair Circle Colliders I utilized initially here, and wanted to maybe allow a player to Eject, lose all followers and aircraft, and be a little pilot running around trying to survive long enough to either find another plane, or more likely within the existing framework as far as ease of integration, get a level up that acts as that event and upgrades you back into a plane.
Rambling here. Thank you so much for the comment!