The Zone went through a radical makeover after the Simon Wai build stage artist Yasuchi Yamaguchi (Judy Totoya) stated that he redesigned it after Rieko Kodama (Phenix Rie) finished working on it since Kodama was unfamiliar with how casinos looked, and felt the atmosphere was lacking. In later versions, icon 1 uses tiles 2EC-2EF, icon 2 uses tiles 2F0-2F3, and icon 3 uses tiles 2F4-2F7.So, if the machines were implemented, all three slots would display the same icons and scroll at the same speed. In the Simon Wai version all three icons use the same animated tiles, 2F4-2F7.The animated tiles are also defined differently: Though there is a 128×128 chunk that would be used for a slot machine at 60, slot machines have yet to be placed in the Zone proper.In Act 1, the first half-pipe is instead made of two 0C chunks. For instance, blocks 0C and 0D should be placed next to each other to form a half-pipe. There are a number of chunks in both Acts that are a few bits off from what they should be.While most of these seem to be arbitrarily placed, the ones in chunk 15 mark where the pinball plungers should be. There are odd black squares (Block 84) that are used in certain chunks.This also let the developers add objects like monitors and springs to the loop tops.

The top of the loops have spotty collision in the prototype that doesn't match the actual art the final version fixes this by adding a solid flat surface to the top of the loop. In the Simon Wai version, the loops are very thin.Since these are frequently used in floor chunks, this is a bit of a problem. The pink diamond blocks and would-be animated blocks aren't solid at the top.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. For some very odd reason, there are two different palettes defined and used for each act.This includes the objects that make the triangular bumpers, conveyor belts, and loops work.

There are no objects at all in the Simon Wai layout.

Sonic the hedgehog 2 casino night zone