The score will increase when a bottle or can reaches the end if the conveyor belt.

The score will increase when you click on a Tyre or battery and drag them off the conveyor.

If you drag a bottle or a can off the conveyor then you lose a life.

If you let a Tyre or Battery reach the end you will lose a life.

Losing all 5 lives you will lose the game.

The game goes on until you quit or lose all your lives.