Expand the screen with the blue button that is located top left of screen. Click on the green flag to start game. Use right and left arrow keys to maneuver the cannon left and right to avoid the falling bombs. Press the space bar to fire the missile to hit the bat and dragon to gain points and accumulate additional health. Speed of falling bombs will gradually increase along with your score. The games ends when your health is equal to zero.
This is the first week's project for CS50 on edx.org via Harvard University - build a project using the Scratch programing environment. Music - Stranglehold by Ted Nugent. Cannon, bombs, and rocket downloaded from Google Images.