Cave almost done!

God we are so STUPID!
Lisbeth... the reason why anything seems weird inside the GUIDialogue
script is because all the objects there have the script are DEACTIVATED!
and therefore can it of course not read anything the right way (you
could say that any function (even update()) is in "read only" mode, but
it dosn't read any changes made in other scripts (why the one bool was
always false))

So I added the OnGUI function in "LetUsGoInvisible" and did the same
code as we started with and it works!
The next button is just over the text box... but it can be moved
tomorrow :)