Sum Arrow Block

According to Billy.
Luckily you can save Billy by drawing a line on the screen to block incoming arrows.
You can only draw on the upper section of the screen.

Billy really, really, REALLY, loves vegetables.
If you destroy one of his beloved vegetables his heart shatters and he loses a life.

Not only does Billy love his vegetables, but his vegetables love him too.
Whenever Billy gets a vegetable he recovers one of his lives.
If Billy spots a vegetable on the ground, he will run to it automatically.