Pretty cool game that I quite enjoyed, but unfortunately feels quite unpolished in a lot of areas!
For the most part, I found the game very cool and reminiscent of something like Titan Souls or Shadow of the Colossus: a mysterious and dark world/story, tons of stylish bosses with sensational attack patterns to them, an interesting core combat mechanic of switching between melee and ranged, decent juicy effects, and so on. I also thought it had some great touches like how the gun puffs when you are out of ammo, and how you have black orbs swoosh over to you when you slash an enemy: really illustrates the mechanic to the player in a subtle way. I love me some boss fights and so I had a pretty darn good time here!
I will say that the game is pretty dang janky, though, which kinda holds it back. There were a lot of sloppy graphical effects like the boss bullets spawning at a different location than the spark effect for them being generated, you can take hits so fast with little invincibility time and insta-die, in general it can be difficult to tell when you get hit at times due to vague hitboxes, reflecting bullets with the sword is inconsistent as sometimes it works and sometimes it doesn't for no reason I can tell (reflecting bullets also makes things a bit too easy), it feels silly that you can walk around when the game is still fake-loading and hasn't faded in yet after a level transition, and it seems like attacks aren't actually limited in fire-rate so technically people with better non-carpal-tunnel hands (or a macro) could have an unfair advantage, and so on and so forth.
While the game does have a lot of little things that hold it back, the broad strokes are still pretty cool and I enjoyed myself. Bit of a bummer that there is no save/load as I was near the end but just wanted to take a little break, only to see all my progress erased. I'll see if I can revisit it later on, maybe once the final boss area has been developed.
EDIT: I know I already said it before, but damn, some of the bosses in this game are just jank as all hell and don't feel good to fight. They look like they should be great to fight with all the fancy effects and attacks they have, but everything is just so untelegraphed and inelegant and confusing to parse. Eventually quit at the final boss: I kept trying but it was just so ugly as it seemed like the only way to win against him was to spam dodge like hell until he finally finishes his pattern and stands still for a nanosecond to let me get an attack in, and my arms/hands just can't keep up with that amount of button mashing or inelegant design. Again, neat game in concept though.