What an interesting game. The first thing you notice is the download size, which is pretty inconvenient. But with the biggest weakness of your engine of choice out of the way, I think you've used its strengths quite well. Seeing an attempt at such an ambitious game, executed this well, certainly impressed me.
This is actually a playable souls game with lots of features! The movement, attacks, combos, dodgerolls, it's all there and it feels good on a controller. Nowhere near as fluent as the games that defined the genre, but it does the job fairly well.
The game takes place in a dungeon, with lots of rooms, chests and switches. The switches are the most annoying part of the game, because there are many bugs related to them. Getting a locked door to open even when you have the key is trial and error. And sometimes your attack buttons stop working, sometimes requiring you to reload a save. The level design is a little all over the place. There are many identical corridors that loop around, creating many redundant paths. Some rooms are pretty much empty, and add nothing to the experience. Now this is probably a case of not having enough time to fill those rooms. I get it, jams are stressful and unpredictable, and the game is technically impressive as it is. The creepy ambience is nice but a little monotonous. My favorite part of the dungeon was probably the optional puzzle room! It gave me strong Ninja Gaiden vibes.
The combat feels alright. Not frustrating and clunky, not perfect and pristine like the best action games of the last 20 years. Somewhere in between. There is overall a lack of feedback with the enemies, which restricts the actions you can confidently execute. The boss fight is a nice addition and there are hints of a nice story, but the fight itself isn't very impressive. The highlight of the game is actually the ambush right before it. There are so many enemies all appearing at once, but they don't simply overwhelm you. To defeat them, I had to use every trick I'd learned, and think carefully about positioning.
Overall: a technically impressive, but unpolished, game with some fine moments and some frustrations.