I recently got this game through Humble Bundle, and when I start the game, it runs smoothly, but once I get to the first level, there are no planets or seedlings on screen. I am prompted to send a seedling to another planet, and shown a tutorial graphic explaining how, but still there's nothing to click on except pause, help, etc. Random clicking reveals nothing hidden. It seems that everything that's procedurally generated is failing to appear entirely.
I'm using Windows XP SP3.