See keymap.c for layer mappings.
The right OLED will grow a sunflower as you type. The growth rate is 1 stage per 1000 keystrokes.
This can be changed in frames.h. Press KC_SPC + KC_ENT to reset it.
Under the _GAME layer there is a _DICE layer (far right thumb key) that allows you to roll a
d{2,4,6,8,10,12,20}. Press KC_SPC to change dice and KC_ENT to roll.