A “My Immortal” text adventure would be too hard. You’d have to enter misspelled commands and, since there are a lot of ways to misspell, most of the time you’d attempt to simply find the correct (mis)spelling for the commands. Also, the correct spelling would change at random and the objects’ names would change. I can see it:

>i

u haev:

a rusty xxxrazorxxx

a Good chralote ticjet

some count Chokula ceral

>look

you’re hair are long and silk and raven. YOu look totally XXXgoffikXXX

>look AROUND

your In the midel of Howgarts Gryffindor dormitory. Outzide is rainign and snowing.

>cut wrists

im sory, Idon’t know this word

>cut wristz

soz, i dont kno thi word

>cut writss

sorry, I doNt know this wrod

>cUt xxxwristzxxx

your arm is bleeding red blood.

yuo know have teh redd blood

>examyne dromitory

You see a black bowl on youre desk

>take bwol

taked

>pour blood

yuo dont have thje blood!

>pour blod

where do you want to poor it on?

>bowl

doen

>put cereal into bowl

you have a bowl with blood and ceral

>eat cereal

your fangs do teh tricjk and youre not bloodhungry anymore

>drink blood

Your xxxfangzxxx are red now.

u suddenly see a prep cming toward u

>flip off

hew do u want to flip off?

>prep

You flip da prepp of. he looks anrgy

here comes draco

>****ING LET ME OUT OH DEAR GOD

i’m sorrty i don;t know thart word

>THIS IS NOT HAPPENING