Chess
Chess by Potato Chan is a chess implementation in Fancade. It contains 7 levels, which increase in order of difficulty apart from the last one, which is a player vs. player mode.
How to Play
Here is a rough beginner's guide if you're getting started with chess. LiChess is also a recommendable website to play chess and do chess puzzles. There are also plenty of YouTube channels which explain chess at a wide variety of levels.