Very much enjoyed my mass murder spree! Loved the humour throughout, particularly the conversations with the father who was delightful. I also thought the variety of responses from the humans were great - some running in fear, some hiding (in vain, of course) and some fighting back.
I found it very hard not to shoot down every flying car I saw - there was something about it which just felt right.
Controls were tight and responsive, I'd have liked WASD as an option for movement but it certainly didn't stop me enjoying it. The range of weapons was great :)