Some sprites that didn't make it into the game:
The sewer - was to be placed right before the rusty nailed boards on Lev 1.
The burning barrel - was to be placed throughout Levels 1 and 6 as an obstacle.
Spewing acid puddle - was a last minute decision to leave as a bubbling puddle.
The snack bar - used in Mark's cutscene on Lev 1, was intended to be the site of the first mini boss. The doors fling open, burning barrels come uh... barreling out as obstacles, and then a mini boss battle. Also, items to pick up on the rooftop.
Entrance sign - was to be placed before the Drive-in sign and Moviela on Lev 1.