Hi there thanks a ton<3 for your word glad you liked it.Really means a lot.
How power system actually works: Well, we originally planned to put 10 turrets in the game. And the game will give you a random turret card means you can get a god tier turret on wave 1 which consume huge power. You can place it and hope getting a power generator card that can run this turret and all others after clearing next wave. Or you can choose power generator/wall instead of the god tier turret. Hope that makes sense. Sadly we didn't have much to add power consuming/generating text on the reward card.