Graphical and UX improvements are obvious in the v0.2 version. I hope you didn't have to sacrifce too many testers to get those nice brain images ;-)
Played until level 07 (Chancellor) , which was hard for me, although the solution isn't that complicated.
One little problem I noticed: When you select a brain or the emitter for starting a connection line that object is graphically marked. But when you reach the end of a connection (the receiver of that connection), this object is not marked (although I saw that the connection line will snap once it comes near a brain). This way I 'overshot' a few times and the connection was not made when I released the mouse button. It would IMO be good if the receiver object (brain or the final receiver) would also be marked, so that the player is sure that the desired connection has been recognized by the game when the mouse button is released.
Will play more after the weekend and make more comments if I find something.
Keep up the good work!