The gameplay here is the same as in other apps like this one: you face a screen containing a large number of objects. Your aim is to find the items listed at the bottom of the screen. Once you find an object tap it to make it disappear from the list, then carry on solving the mystery. Every item you find will help you carry on with your investigation and unlock new rooms or cities where you can get more info about your father and his death.
In Pearl's Peril you also have your own city and have to be very clever about developing it so you can face all the challenges that await you. Gain influence and chase all leads to solve the greatest mystery of your life: Who murdered your father?