The Level design of the actual worlds is great with both the large levels and the interesting ability to morph the levels. Each world is inhabited by an eclectic cast of humorous supporting character and gives the worlds a distinctive feel with a fantastic soundtrack that is just the icing on the cake of nostalgia.
Unlike the original game, this version now has a quick save function by pressing right on the d-pad. This makes the game a lot more forgiving than the original and the level design has been improved with multiple routes though the levels giving the player choice how to approach each situation. The A.I. is hit and miss, when it's good it's fantastic, but this is spoilt when you see the guards glitching out.