The latest game I've made is called Treasure Hunt! It follows the same graphics as Gold Lines except in this game players are using co-ordinates to find hidden gold in the famous battleships style of play.
I've done my best to also make this a two player game where players can sit side by side and hunt for the hidden gold. Here the player who uncovers the last part of the piece will score the points. Players can take it in turns searching around the board to find all the hidden gold.