It's a pretty unique game. Loved the aesthetics. The controls need a little more work I feel, or maybe more suited for controller style, as you need to mostly drag multiple times in the same direction for good speed, but cicking and dragging twice on a small moving electron is not easy. And considering that you are only controlling one electron at a time, I see no reason why you cannot drag in a direction at just any place on screen. As for anything else that can be added, I think a small-minimap that just shows the whole flow would be pretty neat.
Other than that, it is pretty good stuff. Love it.