Hold space to change the angle, and let go to fire. Use the arrow keys to move left and right. The birds give you one point, while dragons take away 50. The dragons are really rare, but get more common as you progress, so you might not ever see one.
In Science class we learned about the mechanics of catapults and then designed and built our own. In Computer Science class we were challenged to solve the design problem: How might we design a computer model that informs a user about the mechanics of how a catapult works? I used Design Thinking to create a Scratch program that is a solution to the user need: A person who wants to learn about catapults needs to understand what makes a projectile go far so as to impress their friends with their knowledge.
