I have testet it on different devices and the minimum requirements I guess are:
CPU: 1.6Ghz Dual Core
Ram: 2 GB
On Easy mode your players get infinite number of basketballs in the training before the first match so it is easier to get a feeling for the gameplay. After the first opponent and in other difficulties every player has two basketballs.
The game is like a street ball tournament, where you are the "magician" coach.
First, you have to motivate your noob players by guiding their basketballs into the basket.
After that you have to face an opponent in a match til 21 Points. There you only can see the score and try to manipulate the game.
You can manipulate only once so be careful!
The manipulation is one of three minigames where you have to try to throw the basketball into the basket.
After that you get back to the screen where the game continues and your score is calculated and added to the score of your team.
If you can beat all 4 enemies the tournament will be over.