It's really hard. Also there are some parts where you really need to keep attention, when to spin, and I got myself holding down the mouse button in case any time the fans are coming from a different angle. Of course, if you hold down the mouse button in the same time you push A or D all those will be a miss.
I'm not saying it is bad, I REALLY enjoyed it, but it needs a lot of work. Keep up the good work ;)