With two earlier levels completed on Silver (actually one was Silver, the other Gold), I had enough geoms to unlock the final planet. Which was really easy – I even got Gold on it!
So that’s it – all done. Apart from going back and bettering my scores and leveling up the other drone states I’d not used much. Sweep and Turret are at max, Attack is almost there, but pretty much everything else is untouched.
After completing the game, I went back to Retro Evolved mode, and totally failed to beat my high score. Pff.
But what an excellent, excellent game. And for £17? Bargainlicious!