What is the licensing for this source code and your tutorials? Can I use the source code here or tutorials on your website as the basis for my own projects regardless of their own licenses?
The code is governed under standard copyright laws, so while you could use it as a basis for your own work (kind of expected, to be fair), you couldn't release that code or re-license it.
So, you wouldn't be able to create a GPL project, for example, and post that publicly.