Read the room’s completion screen
The Glitter collection reaches a Garden Lounge screen with Congratulations above the jar. Its bottom choices are Next Box and Not Now. The complete room is visible with multiple coloured dumplings placed around the furniture.
Choose whether to continue
Use the labelled bottom options according to whether you want another box now. The video proceeds through more themes; it does not show every possible navigation branch from Not Now, so no unseen destination is specified here.
Confirm the theme on the shelf
The later Choose Package screen marks Cute Squishy Dumpling, Glitter Dumpling Squishy, Squishy Bun Rainbow and Crystal Jelly with FULL ribbons. Check the ribbon attached to the named theme rather than assuming every shelf entry is complete.
Check the exact reward name
The developer listing says completing a collection unlocks its Secret Dumpling. These observed completion frames establish the room and FULL states, but do not show a separately labelled Secret claim button or a full named prerequisite list. This guide therefore does not invent an additional claim action or equate the gold Glitter reveal with every theme’s Secret.