Hello! I played it and I took notes!
Actual issues:
Very Wobbly Camera please stop oh god these aren't the jiggle physics I wanted uuuurg
But seriously it goes on way too long and it's way too intense. I dreaded having to go up platforms because of the jump wobble. I don't know that you even need it - Dark Souls and DMC both do fine with no camera wobble.
Fighting the armored greatsword dudes doesn't feel very good. The parry is very Simon-says and using regular attacks gives no feedback.
Enemies in general feel real slow compared to your character. Like your attacks are from DMC but you're fighting enemies from Dark Souls.
The fight with red skull lady is kind of a mess, visually:
Your hit effects, her harmless spell effects and the actual dangerous projectiles she spawns are all the same color so it's hard to tell what's safe.
Nitpicks:
Maybe zoom the camera out a bit? I'd like to be able to see my feet while looking horizontal.
Coming across the road the second time I tried following the road both ways before I saw the actual exit.
Maybe I'm just stupid but when I see a road my first inclination is to try following it.
I seem to remember seeing a version of the air finisher that started with a forward flip. I think that'd be better than the current version.
The roughness on the leather parts of Dao feels weird. Seeing all those specular highlights flashing brighter than anything else in the environment as you're going through a dark tunnel is weird and distracting. But maybe that's an environment or reflection node problem, rather than the material itself needing to be changed.
Bunch of places where the level geometry is too steep to let you land but too flat to slide you off of it if you move into it so you just hang there forever.
For example, trying to just walk on to the stone henge put me in the fall state since the sides of the henge are too steep and I just stayed falling so long as I tried moving forward.
After dying to red skull lady, I got a brief speed boost on respawn?
You can't hit boob mode to get flat Ruina this is false advertising and also hugely unrealistic why would dragons even have mammaries (making them even bigger would also be acceptable)
Suggestions:
The move set is desperately crying out for something that makes you go faster horizontally, either a dodge or a sidestep or a sprint or a lunging attacks or something, as well as a launcher that takes you up into the air.
But overall it's very promising looking, and I look forward to getting thoroughly mogged by you guys in future DDs as well.