Welcome to Break-tris! Your goal is to keep the ball in play while also placing Tetris pieces that are falling. You rotate the falling piece by clicking the mouse button. Pressing Space will cause the piece to fall rapidly.
When the ball strikes a placed brick, the brick is destroyed. If you fill an entire row with falling pieces it is destroyed and the rest of the board shifts down. Every time you destroy 30 bricks an extra ball is put into play.

If all the balls are lost or the falling pieces reach the top, it is game over!