Greasy Fork

I'm trying to figure out how to get the cheat engine: Whenever I boot up, it's not there. I have the developer mode on, and it can modify the pages it's on.

https://wormlewdmod.neocities.org/marvel/mod/

Is this just incompatible?

Yes, that webapp is incompatible with this userscript. In fact, I'm not even sure if it's possible to support it in the first place: unlike CYOAs made in IntCyoaCreator, this one doesn't seem to expose its datastore at all (so I can't find any way to access application state, let alone modify it).