I am sorry, but I could really not get into this. I think the hardest part was how it had airborne enemies. It's very hard to get a good shot. I think the second click activates it, but it didn't do me much good. I guess it challenged me in that sense. The sound effects weren't too good either.
I guess more patient people would enjoy this. I suppose it is a fairly original idea. I'm reminded of a game by Dan Paladin with a similar name that was more enjoyable. It just wasn't for me. It's become at least a little popular here.