Since Levont took most of the words out of my mouth, I'll add a few things he hadn't said.
Ghosts run as fast as your dash ability when there's a direct line of sight, and you can be killed while you're opening a door. This means you're practically already dead as soon as the ghost starts dashing, which is rather unfair.
Since the element above basically forces the gameplay into trial-and-error, the intro being unskippable is rather annoying and is probably my main problem with the game. Also, it might just be me, but the dialog box occasionally blinks while it's still typing.
I'd also like to suggest you to ditch the door-opening fade transition entirely, since objects like keys are already loaded and (in the version I played) visible through walls from the corridors, so I assume the rooms are on the same map and doesn't actually need a loading sequence.
This game has a lot of potential, and I like the style of it a lot, but the execution feels rather rushed. I'm aware that it was made in a game jam, but since you're still updating the game, I thought I'd add a comment for the future.
Keep up the good work!