Game updated!
Added robot faction
In order to open the robot faction, you need to visit the rusty world. Robots create a resource "Power boost", which, in turn, increases the efficiency of crystals. Robots are not reset on normal restarts (but are reset when traveling through worlds).
Added Rusty World
The Rusty World -- the final world in the game. It unlocks the robot faction, and, in a sense, its completion could be considered as the game finale. The robot faction, however, will also be unlocked to all other worlds after that.