The box was a little small and couldn't be resized. I had to change my display settings to make it a bit more readable. And I couldn't tell if my Keyboard wasn't able to register multiple arrow keys at once, which may be a hardware limitation for some people. And I got booted out of the last Boss for some reason.
Other than that, really enjoyed this. Dungeon was a little tricky, but not too tricky to navigate. You could usually see where you haven't explored based on the presence of living foxes.
And the foxes were well paced in difficulty, even if Normal mode wasn't too difficult. Not sure if all the foxes had music based on something, but Grey Fox definitely felt like a riff on Mortal Kombat.
Nice entry!