You earned a prize box!
Set it to 0 to turn prize boxes off.
Extras are repeat prizes beyond the first of each (one of each is always kept). Set it to 0 to turn trading off.
A pack is a zip with box.png, thinking.png, celebrating.png and a rewards folder holding rewards.csv (image, name, rank, percentage) plus the prize pictures.
Saves the prize books, stars, word list and settings to a file, so they survive clearing the browser or moving to another device. Imported theme packs are not included — just import their zips again.
Optional — these replace the theme's character pictures.
