I did a lot of things, except the batteries. There is just one more quest. The last thing I did was some kind of puzzle, which I woke up everyone from their sleeps. But I still can't do the batteries.
After waking everyone up and unlocking the mermaid, you'll need the lighter from the cafe (which you get from fishing in the pond) Then you can do the candle quest in the library. The batteries don't do anything currently.
