Your whole run is a climb through real atmosphere. The sky doesn't just change colour — the air thins, the enemies harden, and somewhere past a hundred kilometres there's nothing left to breathe. Scroll down to go up.
Bright daylight, fat clouds, and everything you know. Birds and low drones drop straight at you while you find your footing. This is where the chain starts — keep it clean and you'll leave the weather behind quickly.
The clouds fall away and the blue deepens. Jets and high balloons share the air, and the first gunners start shooting back. Nothing here is fast yet — but the screen is getting busier, and your multiplier is getting valuable.
This is the layer that burns up meteors, and it's the one that ends most runs. Aimed fire comes faster, targets take more hits, and the sky goes from blue to near-black. Power-ups start mattering — grab spread and shield and push.
Aurora glow, satellites, and fields of debris. The air is so thin it barely counts. Everything up here is heavier and meaner, and tanks start doubling up. You're a few good kills from the line — don't get greedy.
You crossed the line. The sky is black, the stars are sharp, and UFOs replace anything that used to be human. There's no top to this layer — only how long you last and how high the number climbs. This is where the board is decided.