There were two other
small additions to the main game — the first was the grappling hook, which was buggy as hell and didn't add much to the game, other than being able to swing in on a rope and drop a punch on an enemy that landed so hard they were instantly dead.
The
main mechanic outside of the procedural generation is that Bob tends
to receive different abilities along the way, such as jetpacks, double jumps, or other
additions that can be boiled down
to being larger,
smaller, having less friction and other similar tried and true mechanics (although the
game throws a curve - ball by making you fly a spaceship at times).