The way how you tried to upload your game (just a dropbox-url) might be causing an issue - and I’m actually surprised the system lets users do that. If it doesn’t go too much against your plans/publishing philosophy, try uploading your game directly to itch.io.
After you’ve done that, additional actions by a mod or admin might be required to queue another attempt at indexing it.
As an aside: Try to add more information (like the game engine and a few tags that help to describe the game) to your info box. The more complete the information is you’re offering, the easier it will become for potentially interested players to find your game. Because right now… Even if your game was indexed, nobody would be able to find it without already knowing the exact title…