Scrolling Game is Rolling Along (Part 4)

I've been trying to get rid of every unnecessary variable so I'll have the room to split up the Nybble me this, Batman! variables. I need to go back to regular variables so I can understand my code better. When batari Basic finally gets built-in nybble variables, I'll use them, but until then, I'm sticking with regular variables and bit operations.


Related Gyvolver Links:

atariage.com/forums/blog/120/entry-6896-scrolling-game-is-rolling-along-part-1/

atariage.com/forums/blog/120/entry-6902-scrolling-game-is-rolling-along-part-2/

atariage.com/forums/blog/120/entry-6904-scrolling-game-is-rolling-along-part-3/

atariage.com/forums/blog/120/entry-6912-scrolling-game-is-rolling-along-part-4/ (You Are Here)

atariage.com/forums/blog/120/entry-6915-scrolling-game-is-rolling-along-part-5/

atariage.com/forums/blog/120/entry-12601-back-to-gyvolver/