Set Up Guide:
To play Boom Island VR, in VR mode, you must have a VR headset for your device. Such as the Google Cardboard. Your VR Device also must have a trigger or clicker button to be able to click the screen. These buttons, magnets, triggers, ect. Are usually located somewhere on the side of your headset. If you are unsure where it may be, refer to the manual of the headset.
Google Cardboard Model Trigger Location