• Can a 6 to 8 year old go from the home screen to the puzzle and back without reading anything?
• Does tapping pieces (never dragging) work for small hands? NN/g found dragging hard for under 9s.
• Is a gentle shake and a hint picture better than a red cross when an answer is wrong?

Deliberately not here: free typing with the AI helper. Help is three choices, and the "computer, not a person" label uses words and an icon. Needs decisions: the app's sample content covers Years 5 to 10 only, so Grades 1 to 4 would need new content, and children under 13 need a privacy and consent review before this could be built. Reading aloud uses the browser's own voice, which varies. Not built: saving, real puzzles, sound.