Tile Up

Tile Up is a fiendishly clever strategy game. Players try to score points by creating shapes out of their tiles that match goal cards. Easy enough, right? Not so fast! You can only place tiles on top of other tiles if the two tiles are different colors and the tile on top has a lower number than the tiles it is covering. The player with the most points at the end of the game, when the four corners of the gameboard have been covered with tiles, wins! —description from the publisher