Checkpoint 9 (Version 0.9.0)

The early version of Phosphor (Checkpoint 9's internal name) can be found in version 0.9.0, but it was unused. It has many differences from the final version.

Zone 1

 * The cubes' glass was colored more like transparent (real) glass.
 * The music is calming and nice to hear. It is shared with checkpoint 5 stage 3.
 * There are a few parts of segments which are not present in the final game. For example, there's a 3D star in a cube at the end of zone 1.
 * Nested cube frames spin in opposite directions instead of spinning together. The small cube is also smaller and floats in the air, not anchored to a metal cube or even transparent parts.
 * The room is way slower.

Zone 2

 * This room looks completely different at first, though there are many similar things to be found if the player looks closer.
 * It features alternatively configured obstacles; the propellers are used in the final game, but rotated to look better and five-bladed fan propellers.
 * Gears are also used, instead of 5-bladed fan propellers.
 * Octahedral crystals are seen throughout the level, unlike the final (with only two 3D stars found at the end.). This was formerly a High Net Gain zone.
 * This room is both slower and shorter than the final room.
 * The room does not rotate as rotation was not implemented at this point in development.
 * The music is different, shared with checkpoint 5 stage 4.
 * The Propellers are very different, and they rotate faster than the normal speed.

Zone 3
Once again, this room initially looks very different, but has similarities.
 * The room is slower.
 * The music is different, shared with checkpoint 3 stage 2.
 * There are octahedral crystals throughout the room.
 * The room is very static compared to the final room. Many of the glass bars don't move at all.
 * There is one Explosive Ball Power Up found in this room.
 * The second part lacks rotation.
 * Fork s didn't exist back then.