Art director here! Thank you for playing, and I'm glad you enjoyed our game.
That was a bug you ran into! The game is complete in its first form, with a post game skit and final boss fight. We will look into the issue for future post-jam builds.
As for the snakes -- they use ice die, which give you a negative multiplier on your rolls. Try using poison or fire damage to whittle them down when you can't use big rolls.