For our application, we decide to design it as simple as efficiency as possible. Then we have to make our application clarity. The user avoid and often ignore things they cannot understand- that is basic human nature. Avoid designing interface elements that make user wonder what they do, because no one bother finding out.
So VR- Rehearsal decides to “simplify” and move everything behind an abstract icon. The user will feel more comfortable when they understand what the preferred action is. So we used the play－test to test all the icons, tutorial images. And it help us to figure out those interface elements are most prominent.