FlxPongApi demonstrates usage of the FlxGameJolt class in the flixel-addons package, which allows for simple communication with the GameJolt API. The gameplay itself is a sort of roguelike Pong game with various obstacles and enemy types that are encountered as the player progresses. The game is very simple visually, with no art assets and only four colors, with those colors selected programmatically and change very time you play.

You can play FlxPongApi on GameJolt here to see all the functions in action. You can view the source code for FlxGameJolt here.