Before you start developing a mobile game, you need to think over its idea. This is an important stage on which the further success of all gaming activities depends.
Remember, you need to create something original, or something familiar but in a new look. The main thing when creating an idea is to take into account the mass audience. Keep in mind that people will play the game. Therefore, create any mobile games taking into account the interests of those players who will play the game novelty you have created.
Before developing a game for mobile devices, decide what audience it will be for. For young people or for middle-aged people. Will you choose its genre: action, simulation, arcade, strategy, shooter or RPG? Once you've settled on this, move on.