• ✓Idea: the one rule of DNA should be something you PLAY, not something you memorise
• ✓The helix, the backbones, the beads and the translucent glass bases are all SVG, not AI art
• ✓Drag a base from the tray into an empty rung (tap-then-tap works too)
• ✓A correct pair paints the real number of hydrogen bonds — two for A·T, three for C·G
• ✓A wrong base simply won't stick, and the game says which one the rung wants — never a buzzer
• ✓Every sequence is real: the ATG start codon, the TTAGGG telomere, the TATA box, the EcoRI/BamHI sites
• ✓An RNA mode too — wherever a T would go, a U goes instead
• ✓The first screen teaches the pairing rule, and a button brings it back mid-game
• ✓A hint button (glows a rung + bounces the right base), and a breathing pause after a run of misses
• ✓Played on the painted lab plate; Delphi hosts
• ✓Add reading codons into amino acids — the next step after transcriptionplanned

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