Ever wish you could play Donkey-Kong with 16 of your best friends, at once? Every wish you could jump over ghosts instead of barrels?
GhostJumpers is a mini-game from RetroWar that grew to be a fun single player game.
It's free and open source and a good example of how to code your own game. You can modify the source code and change the levels using Tiled
Click to download: