On the continue screen Beetlejuice moves his head to the proper "body" to either continue or end. The image on the left is the one used in the final; however, a look at the tiles in memory seem to indicate this sprite is cobbled together from a larger, more awkward-looking sprite.
More text which may not have been used. Such as:
THIS BRICK SHOULD KNOCK A BIT OF SENSE INTO THE AVERAGE FOOTBALL PLAYER.(10EEA)
THE SPOOK SCROLL PASSWORD
The game uses a special type of compression for its text that assigns specific strings to certain bytes. The above, however, are never used, which are found at address 108BB. "THE SPOOK" may have been replaced by "THE CREATURE" (as in, the stage bosses, when Beetlejuice advises to load up on more scares to use on them), and there is no "SCROLL" or passwords in this game.
There is a hidden programmer credit in the ROM at 0x1FEA5 that says:
* Written by Paul Machacek *