Tell you what finishing a game is really hard, that's why I made 4 free games first
I wrote a puzzle game that was sort of a 3D pair matching type of game, totally finished the game and set about putting the front end on it. After two attempts (and not being particularly happy with either), I then discovered something about my game - it was boring as hell! So it sits on my hard drive, 99% finished and unseen by the world - thankfully. LOL