Swift playground
Swift playground is an app that helps you with coding. You control a small character called byte, and you embark on a puzzle solving quest. There are many codes to learn, like moveForward, turnLeft, etc. Some levels are really hard, or really easy, but as you move on, it starts becoming a lot less easy. Swift playground is quite fun when you know what to do, and when you do know what to do, it gets much easier as you go on, the only reason why is because you know what to do when you understand.