In the game, you can give a character some preserves. (They're delicious.) The last thing I remember doing before going to bed last night was coding up behavior for the transfer of the jam.
I thought I put the code into the creature or, failing that, the jam. I couldn't find it tonight, so I started to put it in the game again. However, I felt I was going insane and did a scan for "slurp" : the one word I was sure was involved with delicious preserves!
As it turns out, I put the code into a random container two rooms over. The joys of coding at an absolutely stupid hour, I guess.