I saw many people are looking for hardcore games here, but no one mention casual game. I am a casual gamer and haven't much time to play complex games. So, I hope someone can recommend some easy-to-play games to me.
PuzzleManiak. Generates numerous levels of difficulties for 24 different puzzle types - as casual or as hardcore as you want.
The puzzle genre is so huge, it is hard to recommend them without knowing the types of puzzle games that you like. However, at the risk of being wrong - the game above is great for sheer size and ability to generate different complexities as noted. Kris Pixton has a number of apps that center around PathPix (the original) and range from very easy to very difficult. A very gentle learning curve is present and so the more complex pictures become much easier to solve than one would think. Definitely a pickup and play / put down and come back later type of game. If you look at the different descriptions, some of the apps are easier or harder all around A second one that I have liked for a very long time is TanZen by Little White Bear Studios. It takes the Tangram pieces and has hundreds of different pictures to solve. Very fun, and also play as you like - it has hints and so is a very casual type of puzzle game. Good luck with your search.
Do you want angry birds like casual game or just easy-to-play without type limit? If you mean the former, I think some match-3 game, like Loafycat and Candy saga, are suit for you. If the latter, some card RPG is really easy to play, such as Dragon Blaze. And I personally think action RPG is also not so complex. You can try Order & Chaos, Forsaken World Mobile and Infinity Blade series.
Action games are easy to play, but need much time to play. So, I want some games that can be stopped at any time
Yeah, I have gotten FWM APK for Android. But there is a connection problem that I can't login currently
Trainyard! Trainyard Express gives you a bunch of levels for free and then you can buy Trainyard to get the rest.
There's a game called "Boom!" that is really fun and I think somewhat of a hidden gem in my opinion. It's a physics-based adventure game for iOS. Check it out when you get a chance! https://itunes.apple.com/us/app/boom!/id579338458?mt=8