

In the control menu, the "Macho Yell" is called the "Bonus Yell".These are all opening tracks to the six levels.

The jukebox only has six tracks available rather than the twenty in the final version.The text for it remains in the final version. A debug option is available on the bottom of the options menu, which allows the player to go to any level and any panel in that level.The credits are in the options screen, since the game does not have an ending at this point.PENDING" on the right rather than the final's "All Rights Reserved." Also, on the title screen, it says "PAT.The Comix Zone logo does not bounce into place.The intro logos are very different compared to the final's.The prototype's header is "JOE PENCIL IN THE COMIX ZONE", followed by the French "JEAN CLAUDE CRAYON DANS LE ZONE COMIQUE".The "DON'T LOOK AT THIS!" message at the top of the ROM is missing.Defeating Mortus sends the player back to the first level.There are no enemies or objects in this level.In the beginning of the page, there are 2 Strigils instead of 3 Spawn Mutants.The levels are not finished by this point.The mission is "OF UTMOST IMPORTANCE", instead of just "CRITICAL".


In the final version, when pausing the game, Sketch will say "SEGA!" after 7 seconds.When you don't press any buttons for a while, Sketch starts talking to player in the prototype.You can not hold the A button to have Sketch make a paper airplane.When an enemy is attacked and they hit the edge of the panel, a green "Slam!" graphic will appear.The "SEGA" boot-up music sound entirely different than the final.
