YOOMP! 7800
tunnel rotation prototype — ball stays fixed, tunnel rotates
ANGLE 0
SPEED 0
DEPTH 0
BOUNCE --
Rotate Tunnel    SPACE Pause    A / S Speed
Concept: Unrolled LDA/AND/ORA/STA blitter writes tunnel slices into EXRAM framebuffer. Maria DLs point to RAM tiles. Rotation = texture offset shift per row.