Open pod bay doors. You can check out to the right if you want, but exit ship left, where you'll see a giant robot.

Keep going left until you see the building--check it all out, leave, go left again until you see the larger temple. There's nothing here now except all the crazy letter/characters on the floor, but check it out and head back to the ship.

At the ship, go down one screen until you’re in the cave. You’ll see strobing lights on each side, but go left where you’ll see yet another temple. Investigate, the go back to the cave and exit to the right this time. Keep heading right until you see the last temple--go in an investigate, then go back to the ship.

Enter the pod bay doors. You'll be asked if you want to wait until nightfall, and you should totally do this.

Once it's night, exit to the left of the ship, and you’ll see two robots outside the ship now. Go left, into the first temple you see--it will glow now, because it's been activated. Exit, go left to the next temple. There’ll be a broken down robot in front; you won’t be able to go in.

Continue back to the ship, and head down one screen again to the cave. Explore both the left and right exits of the cave, visiting both temples again, and entering them to activate the lights.

At this point, if you go back to where the broken robot was, you’ll see that all three lights (red, blue, and green) are all lit. Now head back to the ship and enter the pod, resting for daylight.

Once daylight, exit ship left and head all the way to the left, entering the largest of the temples (with the strange letters/characters on the floor). Nothing will happen, but some traveling needs done to trigger an event. Exit the temple and go back to the ship--you’ll see a small animation of a rumble.

Enter the ship and you’ll see the oxygen is at a critical level. Head out to the right this time, and you’ll see a small cinematic of a robot entering the lake, then floating to rest on the surface.

It’s not necessary to do any more travelling right now--enter the pod one last time and wait for nightfall.

Exit to the left of the ship, and you’ll now see a robot who appears to be waiting for you. First, go down one screen to the cave. Visit both of the temples by exiting the cave to the left, then to the right. This will activate them.

Head back up to the ship, and then to the left of the ship. Enter the temple you see along the way to activate it as well, then continue to the last temple on the left--all three lights will be glowing again

Enter the temple and enjoy the finale!