You may use any Screencast-O-Matic to create a short screencast of your simunlation.

http://www.screencast-o-matic.com/

Your screencast should not be longer than 3 minutes. I only want to see/hear what you were thinking as you played the game. Try to use some of the language that goes with landing a rocket (ie. vector, fuel, soft landing...)

Here is an example: