Here is a prototype for a procedurally generating cave system made out of sudoku grids. 

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The concept is a co-op game where one player has a birds eye view completing the cave's sudokus. Every tile has a chance of spawning a gem monster that player 2 the miner then has to defeat in order to collect the gems and score points.

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What I learned from doing this:

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- C# concepts i.e. classes / inheritance / populating and utilising lists and arrays / tile system

- Towards the end I started trying to add too many different mechanics and systems making the project very bloated and unrefined so I'd strip it back to the fundamental system of procedurally generating sudoku grids with gems that pop out and having player 2 collect them