Features:
- Change graphics on the radar to something more interesting
- Re-orient radar based on Pac's direction
- sound
- 3-D
- 3-D sound
- remove test mode
- handle intermissions better
- handle attract mode better
- Add "ping" to radar
- Finish adding support for more ROM variants
- User interface
- Full-screen 3-D mode?
- maze/graphics/color editor?

Bugs:
- radar redraw sometimes erases Pac-Man if no Pac present on screen.

Code Redo:
- Add asserts.
- Replace * and / with shifts, and comment
- Use consistent naming standards.
