• ✓A real 15-tooth comb: two octaves of plain C major
• ✓No hole sounds wrong — random punching still makes a tune
• ✓The handle follows your hand, it is not a play button
• ✓Three nursery rhymes already punched
• ✓Play names each note as it sounds — โด เร มี
• ✓Name and keep your own song, and open it again later
• ✓Hand a song to a friend as a short code — no account either end
• ✓Print the strip to punch on real paperplanned

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