I don't play games often and not usually for very long. I got something out of this and carried on a while, when I should really have gone to bed- I've done a few levels, but I gotta go!
I think there should have been less difference between 1 and 2. I almost gave up before I got the hang of the control across the diagonals.
I love the sense of realism- so many of these are just white lines. I loved the fact that you could "realistically" bump the axes and survive as long as they didn't chop you and the fact that the different enemies did different things to you.
I might even come back to this, which is rare for me ;)