Zentomino for iPhone is an easy to play puzzle game and a great time killer. While the game may have a simple concept, some of the puzzles are not as simple to solve. To complete a puzzle, you'll take Tetris-like pieces and fit them inside the puzzle designs without overlapping or going outside the boundaries. Drag pieces out of their places or back in, tap them while on the board to rotate them. Sometimes you'll use all the pieces allotted to you, sometimes you won't.