Build the highest tower with 99 Bricks - Time Waster
Pieces also don't lock to a grid in 99 Bricks, the way they do in Tetris. You can wind up with pieces slanted diagonally, and there's an edge of the board that your toppled bricks can fall off of. 99 Bricks is kind of like Jenga, in that it's almost as satisfying to watch your tower crumble as it is to play seriously. Once you get the hang of the way the pieces behave, it's an addictive little game.