This game is about building however you want. Part of the fun with Blockland is experimenting in brick arrangement and that sense of discovery when you move past the "all the walls are 1x1x5s" phase.
Possible tutorial names in the building section.
How to make better trees
How to make rocks
How to build a ball out of bricks
Some people may not be able to figure some of those things out.
And besides, its not like you have to follow the tutorials, its just for if you need it. That's the whole reason I think a tutorial section would be great, for if you need them.