Two things decide this, and neither is the game.
One, the shelf. Thousands of uploads a week, so the itch front page is a lottery. More polish won't fix that. A doorway with existing traffic will: a jam, a genre Discord, a short clip where people already go to watch games.
Two, you said you're not updating. That's the harder one. On Steam especially, the store surfaces whatever moved most recently. No patch, no devlog, no post means no trigger to pull anyone back, and the player curve just drains. One small update resets that clock.
I read this exact pattern for a living, on live numbers, so if you want a second set of eyes on your page, my profile's the door.