Close pls, fixed problem.
With the old GUI.Button you must evaluate the result of GUI.Button like in the following example:
if (GUI.Button(btnRect1,"Play Memory Game"))
{
print("You clicked me at " + System.DateTime.Now.ToString());
Application.LoadLevel("Scene_0001_Memory02");
}
else if (GUI.Button(btnRect2,"Main page"))
{
Application.LoadLevel("Scene_0001");
}
see here: Unity - Scripting API: GUI.Button