Ubongo Extreme: Fun-Size Edition is a portable version of Ubongo Extreme. In the game, players race to solve spatial puzzles by filling spaces with Tetris-like pieces that are composed of connected hexagons instead of squares. The game comes with two difficulty levels so that beginners can compete with more experienced players, with one side of the card having a puzzle that requires three pieces to solve it and the other side having a puzzle that requires four pieces.