I can only talk about aesthetics and music of the game which were great. But I don't know anything about electromagnetic devices, so for first level I ended up searching "how to make electromagnetic force with batteries and coil" :D So I connected the coil to positive and negative of one battery but nothing happened. Is there something I'm missing?
And also being able to rotate and move items you've already placed would be nice.
Oh and I just wanted to say I don't know if you have made educational games before or not, but even though I'm not educated about the subject of this game, I think it would make a great educational game if you polish it and add more levels.