Here is my honest opinion about it -
The pack looks really good, but it kind of exists in a competitive market that kind of has similar products (in a way).
The cover art has a good quality to it and good polish. I still don't really know what I'm getting from the cover art alone, but hopefully things like the description fix that for people.
As for the price, I feel this is a competitive market, and I'm unsure on the value proposition of the pack factoring that in. Here is what I mean... I realize you probably put a lot of work into this pack, and it does look exceptional. But I feel certain assets are in a competitive market. So I'm just saying - the standard price of this asset pack is $6, and the sale price is currently $3. But I'm feeling that as is, this feels like more of a $2-$3 pack.
So here is my suggestion. I don't want to steer you the wrong way, because my opinion could always be wrong, and others might not see it the way I do... but my suggestion is keep prices low for now, letting people try the pack for about $2-$3. I feel a good value for the pack as is would be a regular price of $3, and a sale price of maybe $2 when it goes on sale.
But then again, if my suggestion isn't workable, you don't have to listen to me, either. One of the cool things about Itch is that you get to set your own price, what you think things are worth.
I hope my advice doesn't discourage you though, because I feel it is a good pack, and I think you should continue what you're doing.
Edit: It occured to me when I mentioned cover art, I might have been looking at a banner image on the page. If the cover art is the picture that shows the items, the cover art is fine.