The art style really really works well. I really love the extra polish that goes into the effects and environment like the parallax background.
However, the gameplay is confusing (as expected of a metroidvania), but a little frustratingly so. I don't really have a clear indication of what's up, what's down, when I can jump higher, and if I am making progress. There's a segment with several branches I just can't get across and I don't know if that's because I suck at jumping or I'm missing something?
Also, some of the gates between rooms are a little obscure -- like a brown block that looks like a lot of other environment pieces. It might be best to use something consistent like a black gradient shadow to indicate to the player how to go forward?
The controls also were weird. X or click to slash? Y to force field? I don't have that many fingers. I hooked up a gamepad controller and I couldn't move at all.
Anyways, I feel like this has a lot of potential with a little bit of UX testing.