Take care of the customers as they come in to the hotel! When someone comes in to the hotel, quickly click on them and drag them over to the receptionist to check them in. Then give them their room key, click and drag them to their room. Then do it all over again when the next person arrives. It sounds like it will be super easy, but people come into the hotel more and more quickly so you really have to be on your toes as you move along through the levels. Make sure you keep everyone happy!