Fire, Smoke, Sulfur can be unlocked by getting 100% accuracy in a sequence, regardless of WPM. (please be gentle to the poems, they were just me describing what I saw in my friend's art!)
Ran into a bug after completing the pyramid where skeletons no longer die after they have taken their full health in damage. Their health bar is fully depleted, but they still wander around killing my villagers. Steam version, if it matters.