A game that allows players to experience the process of software development can be an excellent way to introduce coding concepts and programming techniques, including loops and conditional statement. Zachtronics Shenzhen I/O is a game that accomplishes this. It puts players in the shoes unhappy engineers working for a dull company and must build computer chips manually. The circuits they are asked to design get more difficult beginning with making the lights flash in a specific pattern.
The interface of the game is very similar to that is found in browsers, and it helps students learn scripting. Another great example is Screeps, which incorporates JavaScript coding with massively multiplayer online games to build self-sustaining colonies. Both games do a great job of teaching fundamental concepts as well as slowly introduction of new ones.