Those blocks will either be blank (if accessed from the Level Select before any demo plays) or use whatever tiles were loaded in VRAM from the previous Zone (as seen above, where the tiles come from Hill Top). There are certain 16×16 blocks that call for animated tiles in range 3E8-3F7 in the Simon Wai version, but no animated tiles are loaded to those slots.This leads to the player(s) spawning slightly above the ground in Act 1 and way above the ground in Act 2. The starting positions for Sonic and Tails are taken from Emerald Hill.Casino Night is the only zone to do this.
However, they are identical between acts.
This includes the objects that make the triangular bumpers, conveyor belts, and loops work.
