Real addictive loop, once you get the hang of it. I think my best record is 3 "loops requiring 80 energy" in a row before I just got totally swarmed.
I get the feeling if the game had an ending proper that I would have gotten it that run, but I still feel tempted to try again.
This game feels like it could greatly benefit from some sort of score system so I can keep better track of how good my best runs go.