You're a scientist/engineer when one day, you are assigned the task of creating a rocket that must go all the way up to the moon. Of course, you can't do that on your first try. Use your rocket's engine and its boosters to reach checkpoints that give you extra money for upgrades. Also earn money by flying. Use that hard-earned money to buy a stronger hull, better fins, more fuel-efficient boosters and engines, and more. Your rocket gets damaged if you crash into stuff. Make your hard work pay off!
See the tutorial at the beginning of the game.