My nephews and I love playing games together on our tablets, but unfortunately, I've still yet to find a good multiplayer game we could play via Bluetooth. The only ones I come across are puzzle games or other similar games that are a bit too simple. I'm mostly looking for more complex games like FPS or co-op adventure games, but feel free to discuss whatever genre you like because some of our members might still find simpler game recommendations to be helpful.
I don't really play Bluetooth games, so I can't really tell you if there are any good Bluetooth games. But I think that the Bluetooth games that are available, are the lesser games. Bluetooth isn't being used alot if it comes to multiplayer, internet has the overhand when it comes to this. So I think you are going to have a hard time finding a good Bluetooth multiplayer game.
Internet gaming is the dominant type of multiplayer platform. Bluetooth is cool, but is only limited to others who are nearby and have the game as well. It's primitive really. Like old school Pokemon, you can not battle or trade with someone unless they have the game and have a cord to connect it.
Tablets these days are more focused on sharing the screen. It way more fun and brings the closeness of actual multiplayer to reality.
The only game I've come across on android that uses bluetooth is Metal Slug and Tanks. Sorry I can't be much help