Second, everything is physics-driven and destructible, not in distinct parts, but in small, incremental chunks. First, that planet isn't procedurally generated: everything in the game is handcrafted, including the planet and the network of tunnels beneath its surface. Planetoid Pioneers is different for a few reasons.
This is similar to the setup of a lot of 2D games on PC right now. You have a tool which allows you to hoover up the spaceship debris and any other object, turn them into base materials of metal, water, silicon and carbon, and then use them to construct new objects from blueprints.
The game begins when you crashland onto the surface of an alien planet, causing your ship to smash into a dozen pieces.
My demo at Gamescom 2015 focuses mainly on the tools being used to make the game, and with good reason: they're impressive, expansive, and they'll ship with the game when it launches on Early Access this autumn. Someone could create an incredible game within Planetoid Pioneers, it's just too early to tell whether that someone is its developers.