The multiplayer mode is full of glitches and unfair deaths. One player will be controlled with WASD and the other with arrow keys. There are only two players. The ghost player (player 2) is the person that can go through enemies, but cannot change to a different level this player is the one that directs player one. Player one is the classic player that works in the same way as the cat in adventure mode. H to show hitboxes.
SCRATCHY PLATFORMER 2 Thanks to @griffpatch for his tutorials and assets