Brick

BRICK is a simple timing game in which you try to stop a moving block before it reaches the right edge of the screen. To get a high score, try to stop as close to the right edge as possible without hitting the "window" drawn on the right side.

The gimmick is that the block disappears partway across the screen—in a random location each time—so you must remember how fast the block was moving and guess at the best time to stop it. The instructions say you must press the Y key to stop the brick, but you can actually press any key.