Cute game! It was a little confusing at first, so it might help others to mention that the only controls (as far as I know) are W to go into “socket mode”, S to “exit socket mode”, A and D to move left and right, and clicking and dragging with your mouse to move modules around while in socket mode.
Also as far as I can tell, the amount of volts you provide only matters for the visual module – putting more volts into your motor module doesn’t seem to make you “stronger” for example.