Mario Bros. ?-??-83

 

This is a very interesting prototype, as it appears to be a very early movement demo.  Although the screen is full of enemies, they don't move and Mario can walk right through them.  This demo was probably put together to show management how the game would look when finished.

 

Prototype Differences
The prototype displays a static screen with a few turtles and crabs frozen in place. You can move and jump around the screen, but there's nothing else to do.
On the title screen the # key switches between Beginner and Advanced.  This does nothing in the game however since it's only a demo.  In the final version the # key activates a demo.
There is no sound or music.
There is no POW
You move very fast and slide alot.
The levels are much thinner and look different.
The collision detection with the enemy creatures is not implemented.

 

No demo option

 

This is the only screen

 

You can walk right through the enemies

Two players!

 

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