I absolutely love this game. It's very simple, while also being very fun and addictive. It's also super easy to customize the game and create practically any airport in the world (or maybe a fictional airport if you want). Airports are simply .txt files which can easily be modified, and there are a good amount of them posted in the community Discord server for you to download if you don't want to make one yourself. You can also customize the interface itself to look the way you want it to, and can change the realism/difficulty by controlling factors such as traffic and weather. I wholeheartedly recommend this game, especially for the price of $7.