The Lite version does not feature any of the complicating gameplay elements like snow levels, clouds, no-flight zones, or additional aircraft types, but it does include wind speed, level indicators, and onscreen alerts to keep things interesting. Each plane has a marker for where it needs to go - either off the screen or landing at the nearby airport (on one of three or more runways). Planes fly onto the screen and you must plot a course for them with your finger. The interface is simple enough, the menu bare-bones, and the Lite version has a number of ads, but the game itself is solid and while you won't have access to all 50 levels, you can play 10 for free. While there will certainly be comparisons to other (one in particular) games in this niche, Air Traffic Controller manages to find its own way with a number of unique features, engaging gameplay elements, and challenges.
Air Traffic Controller 4.0 XL Lite for iOS is one such game. There are certain games that were meant for a touch screen games in which buttons would be superfluous.
