Really cool, I love the music/atmosphere and the visuals. The darker pallete and lighting looks cool. A few notes on the gameplay itself though:
The current control layout feels pretty bad, maybe having the arrows control both movement and menus and having either attack or dash on left ALT and the bomb on like Z would feel better. It's real hard to use sword/dash/gun/bomb fluidly at the same time with current layout.
The dash having absolutely no i-frames makes it tough to avoid being hit by the bosses' multiple rapid seeking projectiles, and you can't slice them with your sword fast enough because of the short pause after the fourth attack.
If you DPS the boss too fast it combines 2 of it's attacks in a single barrage, like the rapid seeking yellow shots and the red ground circles at once. Not sure if intended.
I could dash attack into the boss' hitbox accidentally and get stuck there, which meant I couldn't use dash attacks at all in the fight or risk getting stuck.
Having dialogue scroll only while you hold ENTER feels a little weird.
Overall it looks real promising, even if it is similar to HLD.