I actually tried this particular swing, but I'm moving similar to my animation. Maybe it's because i did combat sport for some time? The stance has to be firm to do damage, so a counter-rotation feels appropriate.

I'll redo the numbers so they look more even.

Thanks for your comment

I like it but the grass is lacking detail compared to the rocks.

 Oh, I was not expecting a full (but small) mockup. 

I like it. The grass is a bit messy, though. It could do with a little more saturation, too. 

Not a huge fan of the white boarder around the numbers and dash. It feels uneven in some spots. 

The animation could use some work. In real life, if you are swinging a knife with your left hand, your right foot would move with you, about a half pace forward (oposed to just turning). The right arm would not be moving backwards, either. Try it! (but don't hurt yourself :D) 

I do like the motion lines and the tileset. Good luck with your game.