I purchased 22 darts for use in the treehouse. I had to use 21 to get the grand prize. That left 1 dart. When I went in to the treehouse today to play, I had my 3 free darts but not the left over one from yesterday. Way to go TeamLava. Steal my dart when next game starts. I think it's time to can this game especially since you need to purchase darts to win the prize. Not fair.