The original plan of our team was to get the bonus points from the astronauts. However, since the robot was moving at such a slow speed, it was really a waste of time to travel to the Astronaut. This also made moving to different plots a waste, since in the time that the robot took to travel, a whole melon could be planted and harvested.
Our team made a chart of all the travel times to the different locations. Click here to see the link.
Because of this, it was discovered that you could easily plant 2 melons in the time it takes to travel from a plot to the Astronaut. Because of this our team decided to stick to one plot and farm melons for the whole time. We also utilized specific points that allowed us to interact with aspects of the game while saving some battery.