Heyo! I know the rating period hasn't begun yet, but I've reviewed your game early! I'll come back and rate it proper when the rating period begins!
This... was... WOW! You really outdid yourself! This is so much fun. The fights demand learning, but every attack feels fair. Not once did I get hit and think "that wasn't my fault!" The attacks were unique, and I really loved the "counter" attacks enemies used that forced you to use specific moves to avoid damage.
The story is not amazing right now, but it's getting better at least. Characters like Naga and Imp were a treat to see new dialogue for, and I can see where you're going with the shadow guy but I'm a lot less invested in him at the moment just because I don't really care that much about the church.
The upgrade system was really enjoyable, and it probably helped me a lot to get through the game. With that said, it's so much fun I honestly don't even think this needs to be a roguelike, it could easily be a super tough boss rush. I think the roguelike approach does make it easier for players to get through, which will get players through your game faster, but it'll make it more forgiving and help players see it to the end.
Still, I'm tempted to try out a no-upgrade run.
Some of the animations and UI are very jank, I strongly recommend making changes to pretty much anything that uses a pure colour. This includes a few attacks too, most notably the Ancestral Ally attack or whatever it's called that uses those 3D models.
Overall though, this was super fun! I'm not kidding when I say these fights reminded me a lot of the Mario and Luigi games. If you were to make more fights, this would easily be a great title to scratch that itch.
Overall Fun: 5/5 - I had such a good time playing this, I genuinely can't wait for more!
Controls/UI: 3/5 - Controls feel good enough, they're a little jank but acceptable. The UI could use a lot of work, mainly with the aforementioned windows and text that isn't using your normal font and windowskin.
Art: 4/5 - I know this isn't custom made art, but the visual direction looks fantastic, and the use of animations to convey incoming attacks easily bumps this to a 4 for me.
Sound/Music: 3/5 - Just RTP music. You could benefit from better music, but it's not essential. What you have here is at least good enough!