I was able to play for a few minutes, liked what I saw. Was frustrated that my main weapon was not killing the bogies - I had picked the one with the highest DPS on mouse over. Then I saw some sort of energy barrier or something, did another mouse over, and switched weapons. Two shotted both of them.
I'd like to request some sort of hint / tutorial about changing weapons and what those short messages mean. I still don't know what it said, but I think I saw "energy" and I was using an energy weapon at the time.