As @PinballWitcher mentioned, the game is in the database. To further help you out, here is a link where you can suggest games that are not found on Grouvee: https://www.grouvee.com/games/create/
Simply fill the model, submit and if you think you made a mistake when adding new games, don’t worry, we’ll help out as much as needed. Another solution that could be faster is to request a game to be added to the database with a reply to my support topic. I’ll personally moderate it on spot: Gabe's Site Support & Updates Topic (requests are: CLOSED). Though the requests can switch from Closed to Opened depending on when I may be/may not be available so make sure to check the title first!