Above is a screenshot from one of the minigames from Energy Tycoon. The idea behind this one is to place the flowing charges onto the charge-plates. From there you can touch and hold the plates to discharge them.

Discharging serves a few purposes, first to increase your score with a multiplier and second to add more time for you to continue playing. Finally at upgraded facilities the type of charge you choose to discharge will grant you certain abilities that you can use to assist you in your play.