Just a hint first: Look at the code thoroughly. Note that the root directory is actually the ThatGame_Data folder. If you need more help let us know ;-)
Hello! I haven't had such an interesting puzzle experience in a while. Thanks a lot for making this game.
Tiny suggestion for a easter egg (since you are polishing this game so nicely): make it so that setting moving = true in a ducksettings.txt actually makes the rubber ducky move ;-)