Start a new game and collect 120 gems in each level other than Gnasty's World. Get 100 gems in Artisans, Dark Hollow and Toasty since that's as high as those levels go

You only have to collect two sets of items in each flight level to get a total of 120 gems and then exit the level. If you go over 120 or collect the gems in a way where you get stuck under 120 in any level, the run ends

After you collect 120 gems in the last Dream Weavers level, go to Amos and the run officially ends immediately after making contact with him when "Amos the Balloonist" appears on the screen. Gnasty's World is excluded from this run only because of Amos' 6000 gem requirement