Nice game, I had a bug in after about 10-15 minutes of playing where the head got stuck inside a platform and I couldn't get it back, should be an easy fix tho..
Overall it's a nice metroidvania game. I'd happy to have those power ups like the dash and double jump affect the combat in a way, because right now it's about the platforming bits, and the combat got left behind.
The sound design is nice. I like what you did with the 3d audio when you're without your head.
Nice graphics.
Well done!