I like all the mechanics a lot. The structure inventory tetris blown my mind.
Research tree nodes (and probably other UI elements) need a text preview, like you can do with blocks. It's hard to guess what it is by icon alone, and clicking to get that information is bad for searching through.
I hope, if you aim for something like minecraft or factorio, the final game doesn't have an extensive tutorial like this and instead will help you learn as you go through problem solving. This should be better at teaching, since it will feel more meaningful.