wingspan is on my wishlist.
I played this computer game "eliza" by zachtronics and it had this very interesting solitaire mini-game inside it. I liked it so much I bought the zachtronics solitaire collection. And wow, I would launch it "between things" for a moment and it could easily spin the clock forward an hour or more.
I had to delete it from my computer.
I think there are some things you have to just say no to and go through the pain of making yourself bored so something better will fill in.
I think wingspan may remain on my wishlist :)