* NightmareFuel: The enemies are nasty looking, and you spend the last level inside one! (The UsefulNotes/SegaGenesis version also does away with a good deal of the humor of the arcade version, and changes the mood to be more serious in tone)
** The special mention is possibly the Creeper enemies. They don't look scary in Regular Mode, but in First-Person Mode, that's the only way for the player how the Creepers' nasty face actually look like.
** And Giant Creeper in Arcade version, dear God, they are MookMaker! That's a quite escalation from Genesis version because in Genesis version, they are completely harmless.
* ThatOneBoss: The weird pink alien thing, specifically the second form. If you go too near it to attack it, a ''very fast'' fist comes out of its stomach to punch you. If you try to stay away, it bends over and gobbles you up. The only way to win with somewhat more ease is to use jumping/dashing attacks. The third form after it is considerably easier to evade.
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