• ✓Idea (from unscramble worksheets) — but the numeral has to be HIDDEN or it isn't a guess
• ✓One word to a screen: drag the letters into the boxes (or tap-then-tap)
• ✓Get it right and the numeral appears big, with its Thai reading
• ✓Four bands, getting harder: 1–10 → -TY (20, 30 …) → -TEEN (13, 14 …) → compounds (21, 32 …)
• ✓A compound's hyphen is printed for the child, so the spelling built is always real (TWENTY-ONE)
• ✓A wrong word sends the letters home; the second try gives a letter away, and every try after that gives another
• ✓A "give me a letter" button is always there — nobody can get stuck
• ✓A round summary lists every word built, with its numeral and Thai reading
• ✓Letter tiles use the six brand play-colours; a run of misses opens a breathing pause
• ✓Speak the word aloud on the reveal, and add numbers past 100planned

✓ = done · ☐ = planned. Every game is built one step at a time like this.