Does anybody know if they are working on new levels after level 55? I am at level 42 and I just recently found out that there is only 55 levels and that your maximum number of sims is 34. I really wanted to make a lot of unique families and fill all the plots and now I am kind of disappointed. I would not spent all the time and money, if I would have known that earlier.
Your sims will gain experience, doing tasks and going to work, if their needs are maxed out to green. I noticed your sim in the screenshot has most of her needs halfway down. You can also buy higher star appliances, TVs, and other items to help increase their needs faster. If you're still having problems you will need to contact support. You can do this by clicking on the game menu and then clicking on the question mark. It will bring up a form for you to fill out.