Can someone edit my story?

Sienna woke up with a jolt. The bedroom was pitch black and completely silent as she lay in the darkness, the strange feeling of apprehension creeping over her. Although she wasn’t sure what had woken her, Sienna felt uneasy. On her bedside table sat her mobile and she quickly reached for it and turned it on. Shining it around the room revealed nothing, but she still felt uneasy. She soundlessly slipped out of bed and tip-toad over to the door. However, when she was turning the handle, the hairs on the back of her neck stood on end. Someone else was in the room, breathing unsteadily. Sienna’s instincts screamed ‘Run, RUN!’ However, her legs seemed glued to the carpet and it took all she had to simply turn around to look at the unwanted visitor. He was wearing clothes which hung off him like rags and let of a horrible smell of rotting meat. When Sienna shined her phone in his direction, the light lit up his stretching grin to reveal blood-spattered teeth as sharp as daggers. But the most terrifying thing overall was that his pupils shrunk to flecks and reflected the light in a ghostly, silver glow.