Celeste would really fell incomplete without Lena Raine's electronic / ambient / digital fusion soundtrack. While the game's level are brutal, the music covers a wide range of emotions and are always engaging, even when listening to it casually.
Some remixes are a bit below the original tracks quality (1 and 7, in my opinion), but all the others are equal or superior to the originals as they become more epic than they have any right to be.
A Short Hike has a "feel good" but adventurous feeling in it, remembering an idealized but still credible week-end in a semi-wild place. This semi-acoustic soundtrack marries well with this ambiance.