All games that do not have a specific genre or are difficult for them to give a genre are arcade games, they are called casual games.
The goal in which to pass the level, score points. Undoubtedly free arcades are the most popular genre, arcades allow us to happily spend our time when we have nothing to do. Thanks to the freedom of the arcade, developers can do almost any game.
Mobile devices have opened a second wind for this category of games. Many retro hits have already successfully migrated to Android and iOS phones.