- Gun-Nac working great
 - Kirby menus are garbage
 - SMB3 overworld sprites are garbage

- Ready to add support for mappers
 - Block-line background rendering presents certain artifacts in some
   vertical-scrolling games like 1942

- Still some lingering issues with vertical page mapping

- a -> A
 - s -> B
 - q -> Select
 - w -> Start
 - Arrow keys