Thanks very much, I'm putting a lot of time into this game, its also my first. I haven't really done any balancing, atall. I just set the spawns to test my timing system as I've never used it before, and also to test formation spawns.
I think the score idea could be a good thing, only allow the object to random spawn when the score is at X amount, make it a bit more challenging. I'll attempt to add that in today, should be simple. (just activate group at score equal to...)
Thanks very much for the feedback, its great stuff and very helpfull. I hope I can produce a game that you enjoy.