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Act 1
Animated flying saucers can be seen in the background.
Spikes enemies are used instead of Caterkillers.
A sideways spikes trap, which was left unused for the final game.
In edit mode, the player can place the scrapped Splats badnik.
Map
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Prototype
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Final game
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Act 2
These marble pillars aren't moved by pressing switches. Sonic has to keep jumping on them instead. They also animate as if moving up and down.
Map
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Prototype
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Final game
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Act 3
No boss in Act 3, but there is a signpost, allowing you to complete the level.
Map
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Prototype
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Final game
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References