I very much enjoyed the available playable game space that could fit on my monitor and that I could use my gamepad. I will always use the gamepad XD I have more experience with metroidvania than cozy-vania. Keeping in mind this is just the start of the project, a few ideas and suggestions:
When the player is falling, I'm not sure if this is because of your gravity or the camera. The camera works beautiful when the character jumps up. The camera seems to pan upward in front of or with the jump, and more gracefully than not. The space you provide to see up vertically, is appreciated. However, when the player falls, you have no idea what is going to happen below the player because the camera does not pan ahead in the downward vertical direction. It almost feels like the player will fall through the camera if there was no platform to catch the player.
I personally think any game(s) where you have a character on the screen under your control, any interactions that character has, whether it's an enemy or something in the environment, needs to be paired with feedback to show the relationship between the action or event taking place. You have flashing graphic animation using the red color on the white color sprite to indicate damage, which is great. Careful for your ranged enemies' projectiles, they do not have damage flash logic against the player.
It may go without saying, but enhancing your feedback with enemies will be a strong point for your game and making that feedback dynamic.
Ledges tend to be tricky with 2D platforming logic. There is a weird issue with the ledges going on, where the player is sometimes pushed off.
My favorite part about this game so far, is the music. But I'm trying to understand why the music fits with the environment and the entities in the world. The art and music really seem to be trying to convey a strong story and that is definitely worth exploration. You haven't provided any details about a story (that I had seen) or much of the characters other than that they are ghosts. Even with a lack of these details, I have to repeat myself, the music and the art are telling a story. In my opinion, is the project's greatest strength.