I just tested it and it worked fine. Did you fulfill both objectives? [6] and [20]
I figured out what my problem was and I feel silly now. I did not understand that you had to have a die with the specific number (in this case a six with the snake) to get past it. I just thought I had to erase the hit points and was good to go when I hit the V. Sorry about that. I've since finished the game and like it quite a bit. Good job!