Prototype

Final

The insect enemies are larger in the prototype that they are in the final, and also have more wings (ignore the background having different colors -this part of the round keeps going darker and brighter).

Prototype

Final

In the prototype, there is an insect enemy here who was moved back a little in the final.

Prototype

Final

This section has several small conveyer belts on the floors and ceiling in the prototype. They were all removed for the final.

Prototype

Final

The first three tubes you find have enemies inside them in the proto, but in the final, they are already smashed up.

Prototype

Final

This area has a different ceiling in the prototype, and is also missing a large shuriken item which was added for the final.

Prototype

Final

These small enemies also have slightly different colors between versions.

Prototype

Final

The item box here contains a bomb in the proto and a small shuriken item in the final.

Prototype

Final

An item box containing a small shuriken item was added to a corner in the final.

Prototype

Final

This part has two items on the same platform in the prototype, but for the final, one of the boxes was moved down a platform. The top right box contains a small shuriken item in the proto, but a large one in the final.

Prototype

Final

Another ceiling change.

Prototype

Final

In the proto, there is a single test tube here, which isn't broken but contains no enemy. For the final it was changed to three broken tubes with no enemies inside them.

Prototype

Final

In the proto, the part where you have to grab a ceiling conveyer belt to move across to the right has a different floor, with some conveyer belts on the floor which were removed from the final.

Prototype

Final

The area with several small conveyer belts which you have to use to make your way upwards is different between versions. Some of the platforms in the proto are in slightly different places, and more of them have the electric sphere hazards than in the final.

Prototype

Final

The proto is missing an item box here which the final has -it contains a small life item.

Prototype

Final

Another minor design change.

Prototype

Final

The large ceiling conveyer belt has an end to it in the proto, but in the final it goes through the wall.

Prototype

Final

The sub-boss area is different in the proto, and is more difficult to fight in. The final made it easier.

Prototype

Final

Inside the sewer, the proto has different colors, but the background is slightly different also. The pincers for the insect enemies also have slightly different sprites.

Prototype

Final

A small shuriken item in the proto became a small life item for the final...

Prototype

Final

...and later on, a small health item in the proto became a small shuriken item for the final.

Prototype

Final

The secret area in the sewer only has a larger shuriken and extra life items in the proto, and the area is smaller. For the final, a small health item was also added, and the area is slightly bigger. You can also grab the ceiling in the final, something you cannot do in the proto.

Prototype

Final

There is an insect enemy here in the proto who was removed from the final.

Prototype

Final

Right near the end, the proto has an insect enemy who was removed from the final.

Prototype

Final

In the proto, the boss is stronger than he is in the final, taking more hits to kill. The proto boss doesn't change colors when hurt, whilst he does in the final.

Prototype

Final

When the boss dies, he sinks into the ground. In the prototype, his left eye will suddenly go back to normal again, rather than being bloodshot. This was fixed for the final so it stays bloodshot.