This is a game of miniclip tetris and I'm sure that you know how to play tetris.
Make the lines with the help of those block and if you complete the lines then you get the score. Levels and the speed of the game change according to the number of lines and your score. But don't fill up the whole screen other wise it's Game Over.
Controls: Rotate - Up arrow Left - Left arrow Right - Right arrow Down - Down arrow Pause - P Quit - Q Quick drop - Space