What a nice song :)
It sounds like saloon piano, with a beautiful melody and just a relaxing night mood. Kind of like a comfy atmosphere after a long day and finally getting some rest. I can't really place what it is, but the emotion in this song is just great, and I think it's perfectly portrayed by the melody. Maybe it's also some kind of nostalgia? I dunno, but I love it, and I think you did an amazing job. Keep it up!!