By default, the onMe() method actually uses nsLeft/Bottom/Right/Top in order to detect if something is "onMe". The x/y properties are used to make the ego face a particular direction when interacting with it.
So it seems like clicking in this box should activate it: (3, 0) - (9, 7). Basically near the top left of the screen.
My confusion is how does the house door get to where it needs to be? Its default position is (221, 68), which is on the main wall of the house, which doesn't look right at all (haven't played the game, but if I had to guess, it's down on the bottom right along hte path?)