Long, long ago, long enough for me to have irretrievably lost it all, I implemented a few things in SCI0; a questionnaire ala Larry, and a battle system like in Quest for Glory -- albeit somewhat simplified. Also an even more simplified Mega Man Battle Network system. I did these first two without looking at any code, for I could and can not read SCI machine code and had no decompiler. Thus, the only straight copy (IIRC) was the question format. I might've expanded those battle systems if things hadn't happened.
I do so enjoy a little challenge, so here's the deal: you suggest something like the things above, things like battle systems or minigames, and I'll try to implement it in SCI11, assuming it seems reasonable, then release it with adequate documentation and probably placeholder art.
The challenges:- Scored question list
- Simple QfG battle system
- Health meter
The downloads:http://helmet.kafuka.org/sci/