It's a pretty interesting submission. You obviously did a lot and went for a very ambitious project, which is awesome, but is also very hard to pull off. There are a few things that I would change a little though: the screen pulsates from bright to dark, all the time. This makes it borderline impossible for me to see anything when it's dark. Grabbing onto ledges could have a bit of a bigger snap-on area, because right now it feels like I often can't get it to snap. Please add a reticle/ crosshair of some sort, as it's pretty hard to aim right now! Especially the grappeling hook. And also, the grappeling hook didn't always seem to shoot out straight in from of me, sometimes it would just go at an upward angle.
Anyway, that was just a bit of feedback. The graphics are really quite something and killing enemies is super satisfying! They're pretty scary and the sound effects add to that a lot! The bunnyhopping and gaining momentum was also really cool once I got the hang of it, although I found it easier indoors than with floating platforms like in the tutorial. Good job on this game and I hope you will expand, develop and keep working on this game :D