I liked the game, but not a lot. I think the fact that you have to wait between two hits is quite furstrating :x
I understand but it's part of the game to carefully choose where and when to spend your energy.
Perhaps it would be less frustrating with an energy bar, which would allow several shots in a row?
Maybe. Thay way you loose because of the way you play and not because you have two buildings to close to saved them both and have to wait a whole turn to save the second one.