I had a good time overall. While it's pretty clear that this is one of the developer's first game releases, the core concept is interesting and the execution is commendable. The world is polished and detailed, each level is uniquely designed, and the enemies are varied and imaginative. If you're looking for an immersive action platformer, this is one of the better releases to come out of Greenlight.
On the flip side though, as I said before, the fact that this is one of the developer's early efforts is evident. As many people have mentioned, the controls are iffy, and some levels could do with a bit of clarity. Player death can be a hassle (although this is mitigated by a combat reward-based health system) and there is a scattering of minor glitches (though nothing game-breaking.)
But I'd consider it worth chugging through if you're a supporter of worthwhile indie content. With the half-hearted mediocrity that's been flooding Greenlight lately, this kind of thing should be encouraged to rise above the chaff.