/*Welcome to TBD: An Educational Game!
This is a game designed to teach basic programming functions.
To move your spaceship, use the following commands:
this.moveRight(); = one space to the right
this.moveLeft(); = one space to the left
this.moveUp(); = one space up
this.moveDown(); = one space down
Try to reach the planet at the end of the path!
Pro-tip: more advanced users can try automating the process
with this.rightClear(); and this.upClear();! */