2. Simplicity - "K.I.S.S., Keep It Simple Stupid!" Almost everyone has heard that acronym at least once in their life. It's so commonly used but never more relevant than in mobile gaming. When there's a small touchscreen, having many different buttons and keys like on a controller or a keyboard doesn't work out so well. There should be only a few buttons or points of input. For example, Flappy Bird only uses 1, tapping to go up. Keeping it simpler will make it easier and more attractive, which ties into our next law.
3. Easy, but Challenging - While this may seem like an oxymoron, each game needs to have a balance of being easy to start but challenging to keep going. Using the same example as earlier, Flappy Bird is easy to begin. You just tap to go up and go through the openings. However, the game is challenging enough to make people want to come back because they need a better score.
4. Graphics - This is one of the most important aspects to the game. People rely on first impressions of how the app looks to see if the app should be downloaded. If Flappy Bird had had bulky ugly graphics, no one would have even clicked the Install button. People like minimal or pixel art because it looks neat and clean to the eye.
If you use these four laws while making your mobile game, you will have created a mobile game that is bound to attract people. So what are you waiting for? Go out there and make a mobile game!