I've been tasked with writing an essay extolling the virtues of object oriented programming and creating an accompanying game to demonstrate them.

My initial idea is to find a tutorial for a simple game written in a programming language which does not follow the OOP paradigm (or written in an OOP language but not in an OOP way) and recreate it in an OOP way using either C# or Java (haven't yet decided). This would then allow me to make concrete comparisons between the two.

The game doesn't have to be anything complex; Tetris, Pong, etc. that sort of thing. The problem I've had so far is finding a suitable tutorial, any suggestions?