Thank you for the feedback! I definitely agree on the border thing, right now it's fairly subtle but at some point the background gets pitch black if you're really far out from any points of interest, and yea, they're all around where you start :3
Most sounds are just ambient, but thank you for mentioning this! (The only proximity-based sounds are with characters but y'know, you'll know when you're with them because you'll be next to them)