Prototype	Final
The icon of the tower is different in the prototype.

Prototype	Final
These enemies do not have spears in the prototype, but they do in the final.

Prototype	Final
In the prototype, there is one harpy enemy here, the final version has two of them. The minotaur won't use a pillar here, but in the final, he will.

Prototype	Final
The positioning of the upper pillars of bones were changed slightly for the final version.

Prototype	Final
The pillar at the top of this room was removed from the final version.

Prototype	Final
When you enter this room in the final, a mummy appears on the right side. He's not there in the prototype. The final has this stage listed as 3-4, in the prototype it's still listed as part of 3-3.

Prototype	Final
In the prototype, there is only one mummy enemy in this stage, in the final, there are three in total. The prototype mummy appears on the lower platforms, but in the final, they never appear there.

Final

The prototype is missing this part of the stage that the final has, where you have to fight the snake dragon boss.

Prototype	Final
The tower stage is practically unplayable in the prototype -due to glitched collision detection, you can fall through the platform you start on if you head left, and you can't jump on the smaller platform above it -you just pass through it. The screenshots from this point on use a patched version of the rom which fixes the collusion detection. One visible difference is that in the prototype, the clouds in the background do not scroll, whilst in the final version, they do.

Prototype	Final
In the prototype, there are no candles in the tower at all.

Prototype	Final
The final version moved these two enemies further to the left. The bat flies down from the ceiling in the prototype, whilst in the final, it flies in from the left side of the screen. The positioning of the candles is also different, as are some of the graphics at the top of the stage.

Prototype	Final
This stage features a different layout in the prototype, along with some different enemy placement.

Prototype	Final

Prototype	Final

Prototype	Final

Prototype	Final

Prototype	Final
The platforms in 3-6 were made bigger in the final version. Again, the collision detection for these platforms is glitched in the prototype, you will end up falling through them.

Final

Stage 3-8 is not in the prototype.

Prototype	Final
The graphics for the Gargoyle boss are corrupt in the prototype. There are some graphical glitches with the tower as well -the windows are part of the edges are colored yellow instead of black. The floor is also glitched in the prototype, you'll fall through it and die immediately. Use the patched rom to play it. However, be careful when you beat this boss -if you don't collect the orb when it drops, it falls through the floor, even with the patched rom! Failing to collect it will make the level impossible to complete.