In the unmodified version, money is not just a reward—it is a . Saving for a new runway or a faster tug vehicle requires prioritizing safety over speed, often forcing players to make agonizing trade-offs. This economic friction mimics the real-world pressures of an ATC officer: limited budgets, aging infrastructure, and the constant risk of cascading failures.
Use unlimited money to unlock — famous for the "Checkerboard Approach." With no financial risk, practice the visual circle-to-land maneuver 50 times.