Recently I’ve been playing around with the Unity Fungus asset. Although it works very well and I have not had many problems with it, the application is just coming out of Beta and there are a few gotchas. On the forums there seems to be one recurring bug people keep getting stuck with, which for some reason doesn’t seem to come up during a quick Google search. The problem is that when users call a new scene from a block using the ‘Load New Scene’ call option, all menu items on the new scene are not clickable. It is a known issue and an easy fix, which was kindly provided by Fungus admin Chris Gregan:
On any scene that has been called by a block you need to add a EventSystem GameObject. Simply load the scene in Unity and then create the GameObject through the Unity menu through this combination: GameObject > UI > EventSystem.
Fungus should create this GameObject itself during play but for some reason is failing to do so on a new scene call. After you have added it manually menu items on the scene will be clickable.