A lot of the game on the mobile market share characteristics with other games of the same type, and can thus be grouped together in a similar category. Regardless of the type of game we are talking about building, one of the more useful features of the game is to provide some instruction at the beginning of the game. There is usually an interactive explanation of the game’s mechanics that forces you to perform certain actions to make sure you understand how the game is played.
For instance, for a running game, the game guides the user to use the various mechanisms: swipe up to jump, swipe down to slide, swipe left and right to move left and right, and whatever other controls may be involved. The introductory help may also cover what the various menus do, and typically show you how you can upgrade your character.
For a civilization building game, the game illustrates how towns and cities can be built to improve your commerce capabilities, how to speed up the development by spending a secondary currency (like gems), how to upgrade characters in the game, how the menu system works, and detail any other game characteristic.
It’s good to have introductory help; even though the game may be self explanatory and a lot of the games have similar mechanics, it’s good to explain the mechanics so the user can unleash the full potential of the game.