One project that I looked at to get inspiration for music was The Empty Kingdom by Dan Goodbry.
The Empty Kingdom uses minimalistic sounds which I really think is effective. The sounds of nature can be heard throughout the piece but get louder when the character is outside and quieter when the character is inside. There are subtle sound effects throughout - such as the rushing of water when the character is by the river but these sounds come in gradually, there are no abrupt or sudden sound which I think makes the piece very soothing and satisfying.

