Starlit Adventures

This requires you find each of the sticker packs in the 64 story levels. Some require specifics suits to obtain. I was able to find all of them having bought only the flying, bomb, and fire suits (though the fire suit I do not think was strickly needed)
To see if you have a sticker pack missing, select the levels in turn, on the suit select screen, there will be a tick or a cross in the bottom right on a sticker logo to say if you have the sticker on that level or not

More of a secondary tip Fluke939's guide. In the in-game achievements (not the ones that give you points), there are achievements for collecting a whole worlds sticker packs (achievement 19 - achievement 26). This will at least tell you which set of 8 levels to start back tracking in rather than going through each level one at a time.