Firstly, itch.io allows you to put the free sample inside of the same page. People are missing the free sample because it is not included in that page. I also see that the page has no link to the free sample. The tags are correct. The thumbnail survives. However, some screenshots don't survive the size. The new in v1.1, and categories should have bigger font sizes. The first part of the description should have your hook. Currently, the first thing people read is "1.2: all 381 icons are now 381 genuinely different pictures. A hash check on my own pack found 11 names shipping an image that already existed elsewhere in it", which does not make people buy. Overall, it is mostly the page and not the product.
I am looking for the same question.
This month I had 49 views, and 11 downloads, but no sales.