Hey there! First time on itch.io for my part was specifically to play your game! It reminds me of the good ol' days playing on browser just like that...
Anyway, really nice game/aesthetic but I have some advices to make it perfect :
1 : Upgrades need to be more expensive + maybe divided for some? Like 5% instead of 10% accuracy ?
2 : Double items must give less & less money for each time they're looted.
3: A little 1/6 or 1 item found on 'x' available. (I'm not sure if the red check after each locations was meant to be for this?)
4: So, maybe I've been lucky but I had only 2 apparitions at the corner of the shelves at the start/mid game, then nothing at all, just twice the big ghost lady before completing it all haha, so maybe a little more demon spawning?
Then I think it's all good! I gave you my thoughts & advices from most important to less.
Do these corrections, create new upgrades for drones & eggs opening speed, just to give an example. Then maybe new little items added in eggs with another main item needed to be used just like the rosary & boom! After this you'd just need to create Steam achievements & the game is going to be a little success, at least. Maybe a hit if a famous horror influencer ends up attracted by its aura just like me!
(To make you understand how much it attracted me, I first saw a youtuber with 50 likes playing it & it was almost 2 months ago !)
Anyway! Sorry for all these words but to see more of it would be amazing. Even more with many ppl playing it as it shall be. Peace!