This game is a simple.
Because you just guess the number of thumbs raised.
But it's up to you to raise your thumb or not.

It's a pvp game played by 2 to 8 people.
You can play anywhere with your friends nearby because of using Wi-Fi Direct communication.
(You can connect with them at a distance of about 2 to 3 meters.)
For example, on the train, in the park, in the house, on the playground.
Let's play "Thumbs Up?".