After founding her wildly successful salon franchise, Sally decides to take a vacation. While on vacation, she meets a friend in the spa supply business who notes that her business has taken a downturn recently since local spas have been closing. This sparks an idea with Sally to fill the spa void.
Sally's Spa is a time management game where customers file in through the door desiring a variety of spa-type services. These include facials, massages, hot stone treatments, nail clipping and painting, whirlpools, and others. Customers indicate what service they want next with a pictorial balloon above their heads. The player must guide them to the appropriate station in the salon and service the customer. The customers must have their needs met in a timely manner or else their satisfaction meters (measured in hearts) will decrease along with prospective tips. Customers will eventually leave if they are dissatisfied enough. In order to survive, Sally's business must grow a certain amount each day.
Between days at the spa, Sally can use her profits to purchase upgrades for the spa such as more stations, faster equipment, and waiting area amenities for keeping the customers patient. Sally can also hire assistants to staff various stations, thereby lessening her own burden.
Further, Sally sells items from her friend's supply service on consignment. There are different types of products that are more appropriate to sell on different days depending on characteristics (e.g., days with a high UV index can see higher sales of SPF lotion). Sally must stock these items in her limited display case slots based on what is most likely to sell on a given day.