SUM8

From BoardGameGeek:

SUM8 is a two player tile based, puzzle-like strategy game with a rearrangeable board, unique tile design and extreme re-playability. The gameplay is simple: you play against your opponent, each player starting with 8 tiles. In alternating moves you create circles and then eventually '8's in a puzzle like sequence to score points to victory, but don't give your opponent the opportunity to score big! On their turn, players place a tile onto the board, or move an already placed tile on the board to a new spot. This will give the player points based on what / where they place the tile. The game ends when all tiles are played, or no one is able to place or move a tile. The player with the highest score wins!