I would appreciate if you'd correct this. (part2)

It was 3 a.m. and the man was sitting outside; he could see that something was moving through the shrubbery. He described it as a kind of giant praying mantis, something very thin and tall, and which measured about 4 meters in height. That creature started to get closer; the man could see its eyes staring at him. His fear grew like boiling water, and he went (maybe a more urgent verb here like scrambled/scurried) inside the house desperately, locked the door and broke down crying because that creature had hit the door forcefully. The man thought that creature was going to kill him, but he was wrong. He looked through the window and felt certain that the animal was still outside. He could see that creature didn't have skin, its muscles were visible... he wasn't sure about that, though, because it was very dark outside.
However, the creature (had?) moved the thatch packages and put them on the borders of the farmer's property.
The next day, the man got brave and went outside. He realized the creature was watching him from the shrubbery. Then he understood- he had become the pet of something horrible.
The man made experiments, for instance, he released his animals (cows, horses, chickens, etc.). Nothing stopped them, but when he tried to do the same, that creature got closer. It was clear; he was the one he wanted. And he wasn't sure if his shotgun could defend him from something that had decapitated a mature and robust horse.
The man finished his letter, saying that he was running out of supplies, and also that he didn't understand what kind of cruel god could have given him such a horrible punishment.
The last words in the letter were: "I’ll try to escape".