Ideas of questionable quality

[Superlagg]

"Gamey-er" hallucinations. I like how 'shroomz use the player's metaknowledge of the game to fuck with them, like how it tries to trick the player that game mechanics are happening.

The other hallucinogens could work in similar ways to mess more with the player than the spaceman. Something like randomizing the appearance of mobs and objects, changing the descriptions of things and actions, generally making it even harder to figure out what's going on.

Also those hallucination critters that pop out of you? They could actually affect your spaceman! They could do minor brain damage, knock you over, hurt your stamina, block your path, stuff that'd make those phantom cats and dragons slapping you less utterly ignorable. They could spawn a ways away from you and close in a bit more slowly. And with that, you could fight back against them! They'd be killable by anything lethal, including gunfire, even if it's someone else shooting!