• ✓Idea (from the "colour code" worksheets) — but you drag the digits instead of writing them
• ✓The colour key sits at the top: which colour is which digit — with the colour NAMED as well as shown
• ✓Five shape families take turns: rainbow bands, rings, a row of dots, stacked bars and flower petals
• ✓Every figure prints its reading order underneath (outside-in / left-right / bottom-up / clockwise)
• ✓Drag a digit into a box, or tap a digit then tap a box
• ✓Every code uses each colour exactly once, so it can never be ambiguous
• ✓A wrong digit won't stick — the game names the colour of that box and sends you back to the key, never a buzzer
• ✓The whole game uses the six brand play-colours (lib/brand.ts)
• ✓A hint button (glows a box + bounces its colour in the key), and a breathing pause after a run of misses
• ✓Add the reverse mode: give the number, and let the child colour the figure inplanned

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