Saw the ending coming a mile away ;)
Creepy as BALLS. The car part hung me up too, I didn't see the grate because that's where the text pops up when you mouse over something, even the grate itself :(
The puzzles were fine. I didn't have too much trouble with the Sudoku, you gave way more than enough initial numbers to manage that by eye. The spirit buoys were just flat logic, and I tend to eat that for breakfast :D
So yeah. I ask this out of a sense of what could only be masochism but uh...what's next?