1. The game should be relevant cause itch io is based on searchs and tops (how I can understand). use tags and good text. Of course if there are only 100 people a day who interested in these kind of games, you just CANT gain more than 100 views. Opposite - if your hashtag or game is popular you more likely to gain a lot of views.
2. Good text + good tags + good cover image. And (if you want) from other resources (youtube, pinterest, forums, social media and all the places your potencial client can be).
3. People who interested will follow you.
Hope it was useful to you!