A simple but nice endless runner. Very few of them actually have a crouching mechanic, so kudos for that.
While the background art is amazing and you did a great use of parallax, the art for the wolf was pretty messy, as if you tried to remove the background using ms paint's eraser. Consider remaking its art and changing it to a lighter color to better contrast with the background.
Even so, it was really fun :) I got a 770.