You coded both parts of Brektwon, but officially on various sites such as Lemon Commodore, Gamebase 64 the programmer of the game is Marcus? That's a bit strange. The way I understand it is that you wrote the code, someone then made a game out of it, unofficially released it, and you now want an official release, charging for it. And what improvements does your version have?
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Shall I upload my passport?! I wrote the game! Maybe these Marcus Schulz uploaded it on his site. You can find it on Lemon Commodere, ok. But still I'm Marcus. I don't get the point.
And I thought I'd ask for a few bucks for it. OK, maybe a donation would have been enough. But I had a lot of work to do with it at the time.
How can I find the site of Schulz? I guess I'm going to contact him if changed my name in the game into his name.