Planes are holes in the air you throw money into
This game has a lot of potential and I've always loved destruction games, but the plane costs way to much to repair, or maybe the turrets just do too much damage. But after a certain point in the game (usually about 7-12 days in) you're just spending all of your money on keeping your plane flying and you can't spend any money on upgrades until the time that the rocket turrets appear. This is a major drawback and causes a 4/5 instead of a 5 from me.