A free app for Android, by PIXTICLE.

BOKU BOKU is a building game that lets you use blocks to create your own world. You can interact with the objects that are built in the world, such as going to the bathroom, playing the piano, and more. You can do whatever you want in the game, such as exploring and playing with other players, or playing in multiplayer mode. 

In multiplayer mode, you can go to the same world as other players. You can communicate with other players through texts and voice. The physical appearance of your character is also changeable. You can choose to dress like a policeman, a ninja, or wear an animal headgear. You can also choose to be a beautiful girl or put on a suit.