No I see nowhere a Pharo Launcher icon.�

If this was Windows or MacOS I would agree that you could get away without mentioning how to launch the app, though the majority of good documentation usually mentions that. But this is Linux, a diffirent beast, it has 2 ways of working its GUI that differs from linux distro to linux distro, in my case Unity �and terminal usage. Till now I knew that pharo installed through UBUNTU was to be used from terminal, now you telling me that there is an icon that I should click. Its not hard to be confused.