Last level of Jane's Hotel

I am on the last level of this game and I am having a difficult time finishing it. The game is great and I love it, but I cannot finish the last level where everything is in the hotel and lots of guests arrive wanting different things. I just cannot seem to get the required stars or money to finish it. Any hints or tips would be helpful. I've tried to give everyone what they want when they want it and still I cannot finish this game....help please....

You just have to go really quickly - it can take a few tries before you get through it.