Two points to think about.
Good art does not sell by itself. Neither does it warrant a higher price. The opposite is also true. There is a certain correlation, but my opinion is, that this has more to do with overal quality. So you will have games that are "ugly" and sell like crazy and others that have "beautiful" art, but collect dust instead of paying customers. It is just not that important for indie games. People know what they are buying and what to expect.
The exception to this is eye candy. If your target audience plays for the nice pictures to look at and the cool music and responsiveness, then it is very important. Many mobile games operate on this basis. Colorful cheery flashy lights and baubles. Ever played Bejeweled?
And taking it a step further, there are text based games. https://itch.io/games/top-sellers/tag-text-based for examples.
So called pixel art and retro games are another matter. It is sometimes hard to tell good pixel art from bad pixel art, if the pixelation is too pixely or the retro is far too retro. Evil people might even say, that some devs just call their games retro pixel art, because it looks bad and they just pixeled it, so no one could tell ;-) (Not talking about your stuff, that's fine. At least it is a style and not just pixels for pixels' sake.)
The second thing is pricing. If someone is willing to pay 1 $ for your game, that someone probably would have payed 2 $ as well. Transaction fees for low prices suck. Also, if you make a sale, you will get next to nothing and some angry customers that cannot pay less than a Dollar anyways.
Of course I might be mistaken, there are many games priced at 1 $. Maybe there is something to it.
Also, if you make the game paid, you should include a demo version or a web playable version. Browser version is preferred, it lowers the hurdle for people to try out your game. That last one also goes for pay what you want.
Finally, this is itch. Do not wait till your game is finished to upload something. You talked about music and sound effects, that alone will probably put your game above many in terms of quality. The sound can make a big impact, if it fits the scene.