The only level specific object that appears in the object list for the stage is a single bumper. The level layout itself isn’t broken, but is still devoid of objects except for one in Act 2.

Casino Night Zone is more complete in this prototype.

The falling stalagmites are missing, only the rocks seem to appear. The boss spawns above the intended area, so it often moves in midair. The screen lock hasn’t been set for the boss arena completely yet.

The boss for Dust Hill Zone has been implemented.

Dust Hill Zone now has additional objects to make the zone playable.

The horizontal screen lock isn’t used to lock the player to the arena, so the player can walk away from the boss at any time. The boss arena is slightly different, the boss lacks any sound effects, and doesn’t start the boss music when encountered.

The Hill Top Zone boss has been implemented.

The cut elevator platform used in the Simon Wai prototype in Metropolis has been removed but is still present in the object list for this stage.

Green Hill Zone’s boss plays Chemical Plant Zone’s theme instead.

The Spiny badnik is blue instead of red in this build.

For some reason, the object ID changed from $54 to $59. It isn’t present in the object list for this stage, but the code and art still exists.

The cut badnik in Green Hill Zone has been removed.

The prototype ends after completing Aquatic Ruin.

The level order in this prototype is: Green Hill (Emerald Hill), Chemical Plant, Metropolis, Hill Top, Dust Hill (Mystic Cave), and Neo Green Hill (Aquatic Ruin).

Sonic’s final sprite has been implemented.

In comparison to that build, this prototype contains the following differences:

This build is similar in ways to the Simon Wai prototype.The same left over data that was present in Simon Wai also exists in this build in the same area of the ROM.The timer will still reset from 9:59 to 9:00 like in the earlier builds.Then hold A while selecting a level from the level select. Debug Mode - on the title screen, press C, C, Up, Down, Down, Down, Down, Up.Two-Player Mode - on the level select, press B + Start.Different title screen in comparison to the final.None of the unused zone IDs contain any data aside from an associated music ID.Hidden Palace Zone, Wood Zone, Genocide City Zone, Death Egg Zone, and the Special Stage are present in the same state as they were in the Simon Wai prototype.The Sega logo is the same as the one from Sonic 1. However, the Sega logo will display after a level demo. Like the Simon Wai build, the game does not boot up to the Sega logo.

Silver in sonic 2 ssega