Oooh yeah! It was brought to my attention yesterday from a friend, too. What happens is if you get a game over (cross the finish line) while taking damage (in an animation state), clicking the walk button keeps the dog in that animation state where it can't take damage. Not sure when I'll get around to fixing it, but for now, pausing and clicking restart from there should fix the bug!
Thanks! It's funny because I was actually quite torn on the walker for the final build. The current walker is actually almost identical to the prototype back when I first started the game. In the end, I liked how derpy he looked and kept it, haha!
