When it comes to updates right now, there's 2 things to consider:
If you're fixing bugs, especially major bugs that make it hard to play, you are allowed to update your game and update the jam build version of the game.
If you are adding new content then you need to make a separate post jam version and label it as such.
Let me just ask PotaJoe to see where tutorials would fit in and I'll get back to you.