Isogram Challenge

This game is ugly, I admit it.  It was my first creation in C, what can I say? Well, put simply, this is a game with a healthy dictionary of isograms (words that don't have any duplicate letters). It's based on coursework by Ben Tristem in the Unreal Developer course on Udemy.  The computer selects a word suitable for your level and difficulty settings and to start only tells you how many letters it is. User-customizable feedback and hints are designed to give you the game-play experience you find most enjoyable. 

Source Code on GitHub

I went-on to make a single-player TicTacToe game in C, and a game based on "Hangman" I call ZombieMan. 

[I can upload these as-well, if requested]. 

**These are both also for the Windows console.