You have to join electric parts one by one. Every couple of levels new features appear and it's getting more and more interesting and complicated.
A pretty addicting puzzle game! The controls and graphics are top-notch, and I like how the effects and wavy lines make the electricity almost perceptible. The light bulbs standing out on the menu is a pretty neat dimensional addition to the interface too. Music's kinda bland, but the sound effects are great, and the game itself feels perfect. I love the idea, and the game play presents it in a great way!
-cd-
There is a bug : double clicking on "next" when you finish a mission makes apear a second "blue wall" that stay on the screnn for the next stage...
Fun game !
Aside from the gameplay you might want to seriously reconsider your game logo:
https://en.wikipedia.org/wiki/Schutzstaffel