First two settings are meant to be playable cutscenes, then you will see cameras which you will use to find the way to the Nightmare Dimension. In the Nightmare Dimension avoid the monsters and run from the stack of yellow hovering squid called "Slem". There is a virus obstacle that pops up a little. Try to collect coins. Ghosts and the bat Slem kill you in one hit.

DO NOT JUMP in the second setting, there's a bug that makes him jump super high. The Nightmare Dimension is laggy.