Thanks, Richard. So I guess having the source code on GitHub does not count.
Viewing post in Rule Clarification plus Tips and Tricks
No problem. I'm currently working on a second quick entry for the competition. This time I am writing my little game on theC64 computer, with Action Replay cartridge plugin, Turbo Assembler and a couple of Public Domain utilities (Sprite Editor and Char Editor V2). The game idea is based on an old BASIC PD game.