The beginnings of my Air Traffic Control game.

Also, I included my game plan.

planning.md

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+# Air Traffic Control
+
+## Game Description
+
+I want to create an air traffic control game. A player must successfully land airplanes in their corresponding airports without crashing or missing the plane.
+
+### Core Mechanics
+
+- Players will control plane movements with the arrow keys.
+- Players will select which plane they are controlling using the number keys.
+- Planes will be assigned a random color corresponding to the airport they must land in.
+- When a plane successfully lands in the correct airport, the player gains a point.
+- When planes run into each other, the wrong airport, or the edge of the screen, the game ends.
+
+## Challenges
+
+- How numbers should be re-used after a plane associated with that number has already landed.
+- How to increase the difficulty of the game as it progresses.
+- How to make sure there is always a plane on the screen.
+- How to manage the different ways that the game can end.