To anyone commenting "They just won't build the pipes!": You need components.
Anyway, it's a nice and fun game. It is a bit slow though, I'm currently at the third level right now and I was wondering if there are any ways for my workers to deliver science (Heheh) other than taking it all the way back to the Control Center.
Also; the tutorial level needs a few things to explain too, for example the outlets of water and energy and that if you remove the pipes, you won't get anything back.