Batty's Moth Hunt
This was the first game and one of the first programs I ever wrote. It's written in Scratch, a learner programming language created by MIT. If you have someone interested in programming, I highly recommend pointing them to this language as a first try. It was a fun experience that got me excited to learn more programming with more useful languages.
For this game, which works in browser for PC users, you play as a bat with the goal of hunting down moths for dinner using echo-location to find your prey. All the while you must avoid the scary owl hunting you down for his dinner.
Note: To play you will need to access this page from a computer (not phone) and enable "Flash" for this webpage.