Everyone knows Tetris! The goal is to stack blocks of different shapes to form complete rows at the bottom of the table that disappear. If the blocks pile reach the top of the table, the game is over.
The left and right arrow keys on the keyboard allow you to direct the block, pressing the up arrow will rotate it and the down arrow will speed the descent of the block.
A context menu should be shown when right-clicking or, on touch devices, long-pressing in the game. This menu especially allows to play in full screen and control the volume.