(I know this site doesn't give legal advice, but what I'm dealing here with isn't anything serious at all. Also, I apologize to JP for being annoying over this.)

Someone found a game I made on the Internet, and expressed interest in buying it. We agreed upon a price, and, in the meantime, I removed the game's source from the Internet, just to be sure.

Now, I'm wondering what to do next.

These are the terms:

• He gets the game's source code, and only that, without the graphics (which weren't made by me).
• He gets the right to develop and sell the game.
• I get to keep the ownership of the original game, meaning that I can use it in my portfolio when applying for jobs, for example.
• The game gets to stay on its original site.

But I am not sure how can I legally realize this. Which license can I use?