You may find it’s rather difficult to sell something on Itch.io, given many people come here for free content; Especially if you aren’t building a fanbase outside of the site on something like YouTube or Twitter.
Your game’s page also does a poor job of showcasing the game. If you’re going to state that it has 20,000 items, it would be a good idea to prove that somehow, especially considering Minecraft (which seems to be a big inspiration for your project) has not much more than 1,000. Big claims with nothing to back them up don’t make for good advertising, especially with the amount of scams going around these days.