one is on dusty dune galaxy. you need to feed hungry luma, and he will take you to a
pyramid where you can walk on walls. collect all 5 star piece thingymabobs, then you get
green star. the second is on a big lighthouse galaxy in kitchen (yellow block thing). go
underwater and get a torpedo to follow you. instead of smashing the big rock, look around
for a pipe in a case. use torpedo to break open, then go in pipe. then get a bullet to
follow you, and run along a path where the green star is in a case. (i advise you to kill
the monster things first, by the way.) just get bullets to break open cage. then you must
simply collect the last green star. congratulations! go and do the (very hard) green star
missions.

If you need help with any stars go to the first question!