By attracting the attention of an admin, with a good game page and a good release announcement. Hope this helps.
Viewing post in How Can I Get My Game On The Itch Front Page
Now that's a whole other question, isn't it? You have to promote your game every way you can, not just chase a spot on the front page. Those are very few and hard to get. I never made it there, and I have some very successful projects.
Good metadata helps. Social media helps. Devlogs help. But mostly, and I say this to everyone, be active in the community. Play other people's games. Leave comments. Collect them and give ratings. Post in the forums. Notice others, and they'll notice you in turn. Don't just sit there. We're in this together. It's a social activity.