A row of yellow LEDs with a red LED on each end, each end has one push button. The red LEDs represent the goals. When a player presses their button, it acts a stopper for the duration of one light of movement.
- Goal keeper (penultimate) LEDs would be three color LEDs, so the LED can change color while "blocking
- The goals could blink the score between volleys
- The longer the players successfully pass the "ball" back and forth, the faster the LED "ball" would move, resetting after the next score.
- Use the piezo element for sound effects!