Because you are running in a browser, world saves are stored in your browser's cache (IndexedDB). Clear your cache, and you lose your world. Always use the "Export World" feature to download a .json backup file.

The world shattered into a million pieces of light. Every Chromebook in the Remote Study Hall—every exiled, bored, brilliant kid—suddenly flickered. Their quarantine simulations dissolved, replaced by a shared, open world. A world with trees. With caves. With possibility .

: Most repacks consist of a single index.html file or a folder of assets.