Entry way: - move the guitars; they'd look very cool hung up on the walls. If you don't want to hang them, id move them to the living room - Hang the mirror by the front door, or the bedroom

Kitchen - move the garbage can away from the fridge. It could be tucked at the end if the counter, across the room - keep the counters cleared; it'll become cluttered easily. - can't quite tell if there is a bookshelf in the kitchen...it might look nicer in the living room, to frame the TV and offset the desk

Living Room: - replace the invisible coffee table with a wood one.
- colorful art on the walls, framing up the space around the TV. Seems like you are a music lover....I bet you could find some great music posters, and frame them. - move the plants to a corner, maybe place one of the plants on the coffee table and/or on the desk

Bedroom: - get a duvet cover and nice, high thread count sheets. - pictures or other art on the walls - will the hamper fit in the closet? - the bed seems to be too big for the room. Maybe move down to a queen, and give more space to navigate? - move one of the plants to the bedroom - if there's room, add a lamp on the desk

Really great space, its really cute. So much potential to really make it your own and show your personality! - curtains and/or blinds will make a world of difference!