i love the sense of tension throughout this piece, it really lends to the story that you were intending on conveying in your videogame concept. the instrumental palette helps with that also!! i think it's mainly the vocals that help build the "magical forest" ambience...
i can envision the fox exploring unusual biomes of the forests, meeting mysterious fauna of distant fields... :0 i'd love to hear more of the theoretical soundtrack if you ever choose to develop this further!