Please check these sentences. They should be short and coherent:
"On another planet there was a creature which I named. It could biologically change itself (like growing a new leg) or mimic life forms. At some point, the creature noticed that trees make other trees and animals make other animals. The alien felt alone and it decided to make a copy of itself, that has an ability to reproduce further. The creature goes into hibernation to wait until the clone makes more friends. But when it wakes up, it sees that the planet is infected by countless malformed creatures that are vaguely similar to the main character. Unlike the main character, who consumes only dead matter, these ugly clones are eating everything they see. It turns out that when the main character was asleep, its clone made hundreds of other clones. At some point, there was not enough food for everyone, but the clones were designed to continue reproducing no matter what. And instead of dead matter, they started to eat everything. Realizing what he’s done, main character has to stop the endless circle of reproduction."