I'm not really sure what to think of this game.
I really liked the animation and sound design for the whip. The visuals and sound are otherwise pretty unsettling, which is kind of interesting.
Throwing knives on a wall and then jumping on them to climb is a great idea. I fell to my death in the segment where you're taught how to throw knives repeatedly to stay in the air. Again, this is a very interesting idea, but dying there sends you all the way back to the start, which feels really punitive and discouraged me from retrying.
But so far I failed to see the 'metroidvania' part. To me, it played more like a Sonic game. You're going so fast that you zoom through the levels and it seems impossible to mentally map or explore this world (though they were a few places where I suspected an alternate route to be). Also, it felt really strange for the jump to stop all running momentum. It makes the character quite "sticky" instead of fluid like Sonic.
There may be something here, but I'm not sure the metroidvania formula is a good fit for this game.