I'm up for suggestions on the specifics of key handling.
Current Keymapping
Up - Moves 50px up
Down - Moves 50px down
Left - Jumps to previous Category
Right - Jumps to next Category
Page Down - Jumps to next visible area (+ modal height)
Page Up - Jumps to prev visible area (+ modal height)
I've moved @eahrold PR #63 to point to
launch
branch.