A typical breakout, for 1 or 2 players. With an easy-to-use level editor and the possibility to submit the your own levels. There's blocks and bonuses of various kinds. In the cooperative 2 player mode, each one deals with half screen.
Player 1: move the mouse to move, click to throw the ball. Player 2: arrow keys left/right to move, space bar to throw the ball. Use the P key to pause and the S key to toggle sound. The ESC Key to go back to menu. In the level editor use mouse clicks: for instance, drag & drop of blocks to where you want to place them.