I'd would've given this 3 stars (maybe 4), since it's fun, but I don't think the site is always appropriate for tween, (one game had 'sexy' in the title) even though I think most tween girls would want to play dress up games.
One of my sisters one on this website so I decided to go on. Some dress up games seemed innaprorpiate, and I haven't seen innapropriate ads but that's because I just ignore it. I didn't do a lot of exploring on this website, but I don't think it's safe.