I think people are downvoting it since the game appears free on the itch site, those without eagle eyes wouldn't notice the fact that it's only shareware, especially on the itch.io app itself.
Well I mean fair enough, I can't think of a better way to incorporate both a paid and free version on here without making a separate page, which seems pretty unnecessary. It's the same set up for our other paid game on here that has a demo, the way Itch displays it on the front page makes it seem like it's free, even though it is displayed under the games that are for sale.
Yeah, shareware means that it is a free version of the game with locked or restricted content, rather than a set up demo. You can also buy the game on here for a bit cheaper if you wish and get a Steam key for the game with your purchase here.
We also have a summer sale here on Itch that starts the 24th and are a part of the summer sale on Steam whenever that starts if you wanted to wait a few days for it to be cheaper.