This game is AMAZING, I'm depressed now though as I've got the 4 badges :(
Will there ever be more badges to collect? I need more of this, one of the best games I have ever played!
It's not a badge, but a fun bonus challenge is to sweep the board with 13 health points left. If that's too difficult, start off with trying to sweep the board with 10 health points left.
Either way, the key is to try to get all the gold treasures and hopefully the gnome before using a heart. This makes the game more exciting because there's is a big pressure to try and maximize exploration and take risks, rather than take a heart before getting all the treasure (10 hearts) and the gnome (13 hearts).