I have two of the three collision types working! Well at least the basics of them working:

I also got the tiles background working, though for performance reasons I made the backgrounds 512px wide so it’s easier to do bitwise math for calculations.

Doing both of these things required restructuring a TON of code, and included working out good ways to do unit-ish testing in C of the assembler code I’ve been writing. It’s also helped me focus on ensuring dependencies between areas of the game code are as few and deep as possible.

Next is finishing up the final collision type, the rabbit hitting its head. This will involve the physics necessary to get the rabbit to fall correctly and hit the ground. Then I’ll be doing a few additional frames of animation and moving on to other parts of the game.