You just look at them then and press E to take
I didn't see the "E" hotkey on the top right so I assumed picking things up wasn't implemented yet. I should have tried the most obvious hotkey in the world though.
the save file is uncompressed, human readable data for now, but it'll get much better once I optimize it for non-debugging purposes.
Makes sense, I think you should put a "delete world" button for now and tell people in game about the disk space for now. This is one of these save things that people will forget about really easily.