Wow, a lot going on here. Controls are a bit fiddly, but after the first few tutorial levels they were starting to sink in. Tutorials felt a bit slow, but I can see why you felt they were needed with the sheer number of complex blocks.
I liked that in the first few tutorials you explained the controls/system then gave a small challenge so the player can demonstrate understanding. Maybe expand on the puzzle for that block/system rather than introducing the next thing so fast.
Graphics are generally nice and clear. A few of the blocks were hard to distinguish, like the ore refiner/that thing that glues metal together look nearly identical, and the various switches are hard to distinguish at a glance. Also could do with some nice chill music.