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That is understandable to have some oversights, just so you have a working demo to get some feedback on. I've seen a few other people point that out as well, so it's a good sign for you, honestly; it means you have a very devoted fanbase who actually remember and care about details like the blue potion not being used when fighting skeletons. 

As for the bad stuff, yeah, I kind of get that. Most people want that safe stuff, and that's the stuff that tends to sell well too so it makes sense to do that. I just like the extra range that having a bit of darkness provides. If I had to describe the feeling, it's like sweet and salty. They're good on their own, but when combined, they help elevate one another to be even better than they couldn't achieve on their own, as well as being a good Palette cleanser for when there's been too much 'sweet' for me personally.

I do spot a ghost that is in the promo art, so there's always the chance you can do something 'spooky' with that. Unsure how you'd feel about outside help, at least people offering their help. But if you want to do any of the bad stuff, I wouldn't mind trying to write some stuff for it. Making sure not to get too explicit with it and keep it overall lighthearted in tone and spirit.

As for the feedback, you're welcome. I hope to give something detailed and not just a "lets gooooo!" or "Can't wait to play!"  That's good to know people are excited, but doesn't give you the feedback that you're looking for.