Game progress is often saved directly to the browser's IndexedDB or LocalStorage caches. Clearing browser cookies or cache will delete these worlds unless an export feature is provided.

C418’s "Mice on Venus," "Sweden," and "Wet Hands" hit differently when played on a CRT monitor in a quiet library. The audio files in 1.5.2 have a lower bitrate, giving them a nostalgic "chiptune" quality.