So another 2-2.5 hours in, and I finally managed to add item pickup/drop that wasn't buggy. Mostly learned how to use signals for everything, and it all worked out after I cleaned them up a bit and how they were being triggered.

Doesn't feel like much of a difference from yesterday, but it's progress. I also added some UI, and Gold counting on pickup. Most of it is for debugging, but it still helped a lot in figuring out all the bugs in the signals and pickup logic.