Mushrooms as curios are a little dull. My suggestion if it is possible, is to change one of them so that it speeds up the rate at which your curios run - expands your mind, or whatever. This could be done in 2 ways as far as I can see.
(1) Long duration buff, with a very slight effect, say 5% faster at q10 for 12 hours.
(2) Short duration buff with a larger effect, say 50% faster for 10 minutes at q10.
Perhaps there should be a debuff to your charisma or something as well. Or you should have a small chance of hallucinating a bear right on top of you, which can kill you. Not sure.
I have no idea if this is even possible, as I'm not sure how the game handles time... any thoughts on whether this is interesting, or how to improve it?