Thank you for the feedback! Yes, the airports are very different from each other, I'll definitely add some randomization to the values at which the airports are at, and I'll balance them out. Initially, I wanted to make it so the airports actually represent their use in real life, but now in retrospect, that wasn't such a good idea in terms of gameplay. Adding the randomization to the equation would still probably make the airports differ like night and day, but now that it's random, you'll need to actually figure out which one's which. I'll make the game *way* more balanced, as the MASTERAI is ruining the fun in some ways, making airports a bit too profitable. I'll also make it so that each airport will influence how much upkeep you have, so essentially you'll have more upkeep (but only the number in your airport would change to keep it simpler). The fuel cost is shown on the top left, with the little gas icon and the number next to it, the amount of fuel used is shown in the manual, where the farther your plane has to travel (distance) multiplied by the fuel cost at the moment times the number in the manual (80 big, 20 normal, 1 small). I'll add the fuel cost in the plane menu, so if you click on it, you'll have the number for every other plane too with the same type and the same route. At first, I wanted to make it so each airport is represented in difficulty as it is shown on the level select screen. Now that I realise that that is a *horrible* idea as you'll be playing an easy level (like NYC) and you'll send planes and be bombarded by passengers from Atlanta. I'll also add a cap on passengers, where overcrowding way too much will actually bring your popularity down too. But thank you so much for playing the game and giving me feedback! I'll update with these changes as soon as I can, shouldn't take too long as it's just some number changing, but hopefully, it'll be a *much* more balanced game.