Really nice art style and impressive graphics tech! I was amazed how fast and responsive the gameplay is. It runs sooo smooth for a 3D web game and the details like cast shadows and reflections was so cool to see. The mirror room gave me a bit of a jump scare! Such a cool idea.
I don't have much to really critique, it was a really solid demo and proof of concept. I'd say the environment design is probably the area I'd focus on for improvement. Perhaps at the very least a few more landmarks or decorations to help navigation? The one room which splits into four paths was easy to get disoriented and forget which door you just came from, since it all looks similar. Different floor tiles textures, colors, candles, door frames, etc are some suggestions that could help a lot with that.
I really loved the soundtrack too! Especially for a short game jam, I really enjoyed just having some fun high energy music. But just like my previous suggestion for creating distinct zones, sound design and atmosphere could really enhance the feeling of progression and distinctive areas. Jonas Tyroller has a really good video talking about atmospheric sound design and lighting. I feel like with your raytracing tech, there's so much potential for atmosphere and mood with both light and sound.
I was also really intrigued by the potion brew system you had outlined in the GDD! Would be really cool to see it developed :)
I had a lot of fun in my playthrough! It was also the perfect length and difficulty. Really excellent work!!