Hello and welcome to Feedback Quest 9! My name is Hythrain, and I'm one of the hosts for this lovely event! I'm also one of the streamers, so both the game and this feedback are being done live! If you want to see the see the VOD, let me know and I'll link you to it when it's uploaded to YouTube!
This is so well made and a lot of fun too! It has some great creep factors (I hate spiders) and is just fun to play through. Thinking of how to proceed through each fight was a lot of fun! In terms of its gameplay, there's honestly very little I can give feedback on. The design on this is already really good. I could make some suggestions for tweaks (and I'm going to share a couple), but they're honestly not needed. That said, there are three things I should cover before I throw those few suggestions.
There IS one thing I would recommend, though: an arachnophobia mode. As someone who has issues with spiders, this game was mentally challenging to get through, particularly once the spiders were on the ground. An arachnophobia mode, where any spiders in the game are replaced with enemies that wouldn't trigger the phobia, would be a godsend.
I also noticed some writing errors once I got through the run. In the dialogue between the two characters, there are multiple instances of contracted words having the latter part of them split onto a different line (don't and you've) when they should be kept to the same line. I assume your code just puts out the text and is supposed to auto format it, but it breaks a little on these words. Best to get that corrected. Also, there was a line that was just awkward ("I dove you") and another that ended with the wrong punctuation ("You don't know me?").
Lastly, in my first run I got the omen that does 5 damage when the light goes over an enemy. However, I had a fight where I used an item that made moving the light cost no AP and I was somehow able to trigger multiple light damage in a single turn by using it. I don't know if this was a bug or intended, but I worry this combo could be too powerful if it IS intended.
This brings me to my suggestions. There's really only one. I think that first study of a fight was free so long as it was done in the first turn. I imagine down the road there will be multiple different monsters in a single encounter, so this is just me thinking for that scenario as I would also presume that you can only study one at a time.
Otherwise, amazing game!