OK then, Nothing much on TV so I have worked through levels 0 to 4 to find the Snazzy Spheres. Do you want hints? or the answer?
I'll give hints for now:
The title 'Communication' and the comment in the source of 'beeeeep, beep' suggests the morse code.
Different colours = different characters
Different shades = dots and dashes (you work out which is which)
You'll need a Morse chart that includes more than just the letters and numbers to decode the green ones.
That should get you well on the way.