Hill Top Zone's background is partially optimised for 2-player mode the background scrolls independently for both players, which cannot be said for other 1-player only levels. It is theorised that this may be a leftover from an early version of the level, as with the final art the seam is quite obvious. As the code executes, the effect is reverted, so cannot be not seen without hacking. Its object ID is $17.Ĭode exists to scroll part of the top tree background layer at a different rate, giving the impression it is closer to the camera. Unfortunately, the graphics have been deleted, but the coding is intact. The spinning log spikes from Sonic the Hedgehog's Green Hill Zone. Placing one with a subtype greater than 17 will spawn garbage objects on the right. Its height is equal to 16*(lower five bits of subtype)+16 pixels. Again, the graphics no longer exist in the ROM. The waterfall object from Hidden Palace Zone, which is also left over. It's a simple solid indestructible object and its coding hasn't changed since the Nick Arcade prototype. The graphics are long gone, but the code is still there. The emerald-shaped object that was used in Hidden Palace Zone to block off a tube. However, only those that are 6 segments long are used (subtypes 05 and 15), leaving all other subtypes unused.Īlthough very similar to the small platforms used in Metropolis Zone, this platform behaves strangely, usually rising at an angle. The blue bubble snakes in Chemical Plant Zone have many subtypes that define their movement pattern ( 00- 0F for jumping back and forth, 10- 1F for jumping between the floor and ceiling) and their length, which can be any number of segments between 1 and 16. The upper four bits can be used to offset when it starts to rise in the air. The amount of time it floats in the air is 128*(lower four bits of subtype) frames. Every 1024 frames, it will slowly rise up for 128 frames, float in the air, then come back down 128 frames later. To see it, a monitor's subtype should be set to 00.Ī hovering platform for Chemical Plant Zone that has been around since the Nick Arcade prototype. A static or blank monitor which harms the player when broken.
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