Saves should be under Users/<Username>/AppData/Roaming/Dapplecap for the Windows version, and in your web cache for the HTML player.
I've checked and the code for finding resources is indeed identifying the log pile as a tree because it contains wood!
Hmm... I might have the player character have WSAD movement controls and ENTER to interact with resources as per your suggestion, it'd help set them apart from the other inhabitants.
I get what your saying about the slimes. I'll modify their mimic script to account for the filters.