The art is quite pretty. I especially like the portraits. The artstyle and the cryptic atmosphere reminds me of Nier which is a plus.
Though the sprites are great, I find the attack animation a bit odd. It looks like she flails her arm and the sword moves independently. Maybe you can add a strongly posed keyframe at the end where she grips the sword after the swipe.
Combat wise, hitting things is fun but I think the game needs more verbs. I quit at the boss because you have no defensive options like dodging and some of the attacks do not have a long enough animation for the player to see and avoid. Maybe you're supposed to out level the boss or grind for heals. However, I can't recommend making grinding a requirement if you want people to play for the story. Additionally, I would like to be able to attack mid-air/directionally like hollow knight.
UI is stylish, However, I found the level up screen confusing. I could select a stat with arrows but couldn't actually level it up. I pressed every key in the keyboard to try and spend the currency but couldn't level up. I had 75 G and the level up screen said 30. So there's no reason to not be able to level up there. If it is a different currency then that should be communicated.
Level design wise, it has the "leap of faith issue" with spikes falling from places you can't see until you jump through. Both the spikes and the spiders blend in with the background. I don't know if that is intentional but combined with the lack of heals with repeated dialogue after death made the level design frustrating.
I don't have any issue with respawning to a checkpoint after death. But repeating cutscenes after death feels punishing. You can integrate respawning into the narrative, have a skip button for seen dialogue or just put a save point at every cutscene.
The story setup feels interesting with the white room portions. The worldbuilding is good at dropping hints. The only complaint have is that the spider dad doesn't feel like an interesting boss storywise. If you're going with a world that contrasts with ours(it already has goblins), it'd be better to have a boss creatures that wouldn't exist in the normal world.
Overall, good job. I think the story has potential if you manage to spice up the combat and improve the pacing.