I really liked the concept of this game, and how well the music settled the player into a mysterious atmosphere. Motor controls were very smooth on my end, but perhaps a little fast. Both endings were very unexpected turns; it really makes you think about what's going on inside that fox's head.
I would recommend adding some more buttons (eg. replay, mute), and maybe fixing that small glitch with the double jump. Still a nice game, overall!
I look forward to more of your games in the future!!