A few tips:
Thank you for your feedback, and that I spent a whole month working on an inventory project when I realized that it was an area little explored here but it didn't make any sales, I still went ahead with the work to launch it on the auction sale but honestly it was frustrating not having at least one sale, I'll think about the tips you gave me and try to improve my art
I guess that's just one of the disadvantages with a big site like itch.io, your works can drown in all the other content out there. I had the same experience when I signed up for the GMTK game jam, I made a game I'm proud of, and I felt it didn't get the attention it deserved because there were just so many thousands of other (really good) games out there.
I guess just keep trucking and making stuff, eventually you'll probably make a name for yourself. Also it helps to promote yourself in various (non-intrusive) ways. I really like your style, by the way. If it fit the mood of the game I was making I'd gladly use your assets.