Thank you so much for your amazing feedback and review!
The movement and combat system are definitely veeeeeery clunky. I guess Rpg Maker isn't a really good option for making these types of games (Pixel Game Maker MV is the perfect option for that). But I definitely had fun trying to implement these mechanics in MZ.
I'm glad that you could see that I was inspired by Castlevania! I'm a huge fan of the Castlevania games, specially 1, 3, IV, SOTN, AOS, HOD and Bloodlines
The final boss is definitely doable. This is the strategy:
1. stand on the safe tile until the boss stops sending the death lights (there's a safe tile where the lights will never reach you, it's near the edge)
2. stand on the edge of the screen to avoid her attack while she's red
3. once her color scheme goes back to normal, get close to her and shoot
4. repeat that 9 more times (or less, since you can get critical hits)