I had a rocky start at first. When the instructions disappeared, I found something to click, but I think I blew myself up and possibly the planet. I saw credits, but wasn't sure if it was the ending or beginning, since it was so short, then the application closed. I figured I just screwed up, so restarted the game.
When I reopened it, the intro was a little different. Then I was on the world and there was nothing but empty expanse and sun. I thought, is this some sort of permadeath, there's nothing for me to return to since I blew it up the first time? I wandered around a bit without seeing anything, then exited.
I was about to uninstall but decided to check the comments. Clearly there was a lot I hadn't seen, so I restarted it again and it worked, the intro was back to normal and I'm exploring.
Was my second play session a bug or intentional? Hopefully this isn't a spoiler.