I figured that a nice and easy way to learn AppGameKit was to put together a simple game based upon one of the old Sharp Wondertopia calculator games that I have. So I created 'Digittack', which gave me the opportunity to learn AppGameKit Basic, using a decent number of features - sprites, tweens, sound, music, input, animations, text, etc. It's pretty simple, and sometimes that's the best way to become familiar with all of the features!
Digittack is a shooter. Digits will appear on screen, and you have to destroy them before they reach critical mass. Controls are simple, move left/right and fire.
It's available on GameJolt, link below. For now it's just an HTML5 game, but will add a few more features for an Android, PC, and Linux versions.