Pong... On your Wemos D1 mini with the Wemos oled shield.
Just altered this. Have not tested buttons or human player.
Developed on Arduino 1.8.3
Install the Adafruit_GFX library via Sketch->Include Library->Manage Libraries
Clone into your ~Ardunio directory, open in arduino IDE, compile, and install.
cd ~/Arduino
~/Arduino $ git clone https://github.com/sboger/Arduino-Pong.git