1) Does this game play well with two players?
2) If you have played with two players do you use the suggested additional ghost player or do you play it straight up - no ghost player?
3)Which do you prefer?
I've played it both ways. I prefer the ghost as I find that the ghost player helps fill the board quicker which makes the game more "interesting" early on.
Without the ghost, the game is a little slow at the start. My wife prefers without the ghost so when we play, we just do the two player. The game is fine there too.