This free online HTML5 game can be played on any device. It doesn't take Einstein to work out that this game is based on Tetris. The rules are exactly the same as in the classic game. Try and form a complete horizontal row of blocks (in this case they're mini pyramids) to make that row disappear. Once the blocks reach the top of the screen the game is over. Twist and move the blocks to make them fit into the spaces. You can do this by clicking/touching the green icons at the bottom of the gameplay area. Can you make it onto the leaderboard?
As Tetris games go, Tetrix is one of the better ones out there with attractive, modern graphics with nice shadow effects that give the impression of pyramids. The game is also responsive which makes it enjoyable to play - enjoy!
Screen grab from Tetrix