"Your construct isn't stable enough to manipulate yet. That's all right. It just means you'll need to practice. You can let go of the image now..." Felix said. He'd almost said 'open your eyes', but well...

"You have the structure now. Just work on picturing your room every day, preferably right before you go to sleep. Once you have enough control, you can open the doors. That door and your door to the past are the ones you will want to try and open. Leave the others. In time, as the construct gets stronger, it may change on it's own. The doors in particular may take up traits according to the dreams you assigned them. Don't be alarmed by that. It's subconscious. And above all remember that whatever you see cannot harm you unless you let it."