A trio of rocks are playing instruments at a concert, they’re playing rock music (or as close as you can get to it on the Atari 2600.) Pressing the fire button will switch the game from the title screen to the main game. In the game, rocks are falling onto your keyboard. Your job is to pick them up and put them into the tray below. But don’t even touch the red hot rocks, they’ll burn you. But since I just started this earlier today, there are no rocks to pick up yet. But you can move the arm and hand around. Pressing the fire button in the game will pick up rocks. Hold on to the rocks with the fire button and then drop them into the tray below by letting go of the fire button.

http://atariage.com/forums/topic/257276-rock-concert/