This is a game project of the popular game Tic Tac Toe also known as X and 0. This game uses simple coding in kotlin, check it out. Has two modes of game, Player v/s CPU where the CPU chooses random places for placing its 0, and another is Player v/s Player where two player can play against each other but only on one device, for multiplayer game using firebase check out my other git repository of TicTacToe-Multiplayer.
It is created using android studio and the language used is Kotlin.
It is live on Amazon App Store : https://www.amazon.com/Metal-Tic-Tac-Toe-Awesome/dp/B079P6PJFV/ref=sr_1_3?s=mobile-apps&ie=UTF8&qid=1528402112&sr=1-3
APK is also included along with the files.