OVER 500 CHALLENGES: Play it again and again, increasing the difficulty and changing the shapes used in each puzzle! SOLO OR COMPETITIVE: Tweak the rules to play with another player, trying to be the first to completely fill your side of the board. BEAUTIFUL WOODEN PIECES: Leave the game setup on your coffee table between challenges, since the attractive and colorful pieces make a nice accent to your decor. CLASSIC PUZZLE: The game has had success for decades on end since its original release in the '90s, making it a true classic in the puzzle genre. UNIVERSAL GAMEPLAY: This brain teaser is enjoyed by kids and adults alike, since the rules are easy to understand and the puzzle is satisfying.