Thanks for playing! :)
Your towers can store some energy, if you create a loop between them.The beam is wider if the tower has enough energy for a more powerful shot, the beams width correlates its strength.
It would make more sense, if there were more bases/energy souces.
it's quite unbalanced right now, I guess you could win just by using the base instead of the towers... xd
I think there is some potential within this idea, but it needs a lot more polish than this.