Darksoul:
You can't just say: "I have thought of all these ideas for my game, no-one else could have thought of them, so they are mine, and only mine" Because others can have that idea before you.
You're saying that he should give credit to you? Wait. You're the only one who is going to need this the exact way it is, and so you haven't been able to do it, I don't know why. Maybe you're lazy, or made a bad code. And because of that you say that you should have credit in a tutorial for you? It's like me going up to TRM and saying "I needed a save engine like yours so you have to give me credit" I mean, if he was going to make a combat tutorial he would make one for Zelda games, with Zelda defaults like item switching, sword spin, maybe targeting, you get the picture!
-SK