There are incredibly many platform games around but when I type platform game tutorial into a search engine I'll get horribly written flash tutorials. A curious thing because computer games have been longer around than personal computers.
Have you seen properly written platform or puzzle game tutorials around that start from the blank sources?
I read around stackoverflow and found an interesting answer to a similar question, but it's only a quite weird argumentation. Most sense makes the part "tutorial would be so big and complex, it'd be pointless".
People want to write games, why wouldn't it be possible to write a good tutorial on how to write a certain game? There are lot of simple platform games around that you could pick on.
Okay. Writing a game is complex task and you are required to work on small pieces. All right. But how do you punch the pieces together? And can you really find out how to get those all small pieces to work off? Do you stand on to even slightly useful design straight out? Most importantly, do you find out how to prepare content and write tools to do what you need? It's often not only the game you need to write from the most smallest primitives, you'll need the tools to create the game itself.
Agreed, if you write a game without game-development tools then you must be a programmer because you write your own tools. That's not a simple task and a too high-quality documentation might become the standard way of doing this stuff, extinguishing the possible creativity the user might want to apply into his work.