Not sure what the object of Grow Home is exactly.
I think the robot is collecting the crystals to make methamphetamine back at the lab. That's why he's always so jittery and bouncing around everywhere, and so prone to self-destruction.
Kind of like "Breaking B.U.D."
Maybe. :p
I took it as the round things being seeds for vines to tap into floating islands. At one point in watching Kali play, I said, out loud, "No, Kali! Not the goat!!"
You're a lil robot named B.U.D., and you arrive at a planet to find out as much as you can before you return to the ship, but to make it back you have to grow a plant up to the skies.
This peaceful planet was filled with floating islands that had energy, but because you are helping this weed grow, you suck out the life of this planet <.< and when you reach the top you get 8 more seeds to send back home, to grow there.
You literally are destroying worlds with this plant, but hey, you get to fly around, so it's fine.
Also, since you jumped out of the ship without any way to slow your descent, you crash losing all of your energy, so you have to collect 100 crystals from that planet to recover.