Great idea for a game. At first it looks like just another terarria clone, but it brings Incredible Machine vibes to totally change the game.
Personally, I got stuck at the arc furnace tutorial. I couldn't figure out how to automate building a bridge across that gap. Maybe I'm stupid, but I'd prefer a simpler machine as the first machine, maybe one that just involves the mantler and pusher without trying to also make copper bars.
Bugs/improvements:
I repeatedly left clicked an ore and it gave me already extracted minerals, making the extractor useless and meaning I only need one ore to get unlimited materials.
Browsing the blocks on the screen on the left was hard because the details for the block are way over on the right. Might be ok on a laptop screen but it was too far away on my 27" monitor
Default zoom level seemed way too far at 4K, but that's easily fixed once you reach the point in the tutorial that tells you.
If I right click to move some blocks, they come out and other block fall right away. This is a problem if I missed my click or didn't realize a block was still welded to another, and I want to "undo" my right click to leave the block in place. The way it is now, a misclick means I have to rearrange my entire machine because all the parts fell down.
Remember, any game where you can build a giant dick will be a success!