Amon transferred all the goods into his space ring including the compasses. He assumed the compasses as something the boys used to determine direction within this dimension. Perhaps the direction facing the depth of the woods was this dimension's equivalent of the north pole.
He threw away the two boy's space rings and disposed of the body. He dug a large hole and then buried them inside. It's not that he wanted to give them a proper burial. It's just that if someone else came again and saw the body, they would be alerted and it would be harder for Amon to ambush them.
Afterward, he returned to his chores of building the plantation inside his space ring.