Hey Sloup, actually the 5-star rating system is enabled by default for all new projects.
If you can't see the star ratings on your own game page, it is usually because itch.io hides the rating button from the project creator to prevent self-rating.
Do you mean if you rate Orbit, can I see the rating you gave? Yep, I can see it by going to my game's page, then Analytics. You can do the same on your own page.
