Hi Dash! Sorry for the late reply.
First of all, the UI is perfect for me! It feels great to use, and everything works really well. The only issue I noticed is related to my own setup. I play on a 2K display, so some buttons don't line up perfectly with their actions, but that's more of a resolution scaling issue than a problem with the UI itself. I know supporting every resolution is difficult, so no worries—I usually play at 1920×1080 anyways.
I did notice one bug in the third view that's a bit annoying. Mita appears in a very low resolution, but as soon as I change the POV, her quality goes back to normal. (Can't help more with that)
I absolutely love the environment and the lighting. It really adds to the atmosphere and gives the game a unique charm.
One thing I found a bit difficult is seeing Mita in the new dark environment. If the intention is for players to rely on the mouse flashlight, i understand. However, it could be nice to have a button to turn the room lights on/off (where appropriate), or maybe make the flashlight beam a little stronger(Wider) as a Power-Up.
Speaking of Power-Ups, I think adding small icons for them would be a fun touch and make them easier to recognize at a glance.
P.S. Please consider adding an "Are you sure?" confirmation box for the (Purge_Data) button. I've accidentally deleted my saves three times already... definitely a skill issue on my part.
Btw the Crazy Mita its suprizing scary!!! you gonna add an jumpscare or something? (Right now, when you look at the bed CAP-Mita disapears, and Crazy-Mita too.
Last question you gonna make other games, next of this? If (yes) witch theme and what?
Finally, all of these are just suggestions and ideas. If you already have your own vision or plans for these features, I'd be happy with that too. I'm really enjoying the game and can't wait to see how it develops!