Mesh

Train your brain by Mesh, classical addictive puzzle game for single player. If you like brain-teasing games for single players, you are going to enjoy Mesh.
It features a simple game concept: theres a top-down grid which is a network connected up the source and multiple nodes (bulbs). They have been shuffled randomly and your goal is to rotate them in order to re-connect all the wires in such a way that the energy flows through all the bulbs.

The successful solution will be an entirely connected network, with no closed loops.