Not a whole lot of people submit photos like this. Most people ask for comments on a grow room, or a grow cab. But whatever. If that's all you have to work with, then roll with it, it will be fine. If you can move your clothes into another closet, it would give you more room, and therefore more room for your plants. No harm in that, but it isn't required. Putting mylar all around the plants is also more beneficial than on one side, but if that's what you have to work with, then so be it.
By the way, mylar really shouldn't be applied like that. It's very important that you keep it as smooth and flat as possible. Those wrinkles and krinks will cause hot spots and burn your plants. If you can't keep it flat, just go with white paint, it would end up being much better. Also, I recomend that you get a fan in there, it will help you out.
What lights are you using? I know you said CFLs but how many, what wattage? Any reflector? Temps?