The document summarizes 4 existing matching games: Candy Crush, Bejeweled Blitz, Unstoppabull, and an unnamed underwater-themed game. It notes common features like using bright colors, backgrounds related to the theme, music/sounds, and challenges like timers or targets to make the games exciting. The analysis concludes the author will include bright colors, music/sounds, and a challenge in their own game to keep the audience engaged.