LITTLE LETTERS. LONG MEMORIES.
Some things are
worth piecing together.
A moth’s wings. A faraway lake. A letter from the glasshouse.
Restore eight postcards, one tiny fragment at a time.
A letter in four letters
Each fragment is part of the same molecular ribbon. Match overlapping A, C, G and T letters to rebuild it. Every column needs a readable letter; overlaps must agree with each other and with the two fixed bookends.
- Select a fragment from the tray or its row.
- Tap a numbered column to place its first letter there. Use ← / → to slide it.
- Later letters can arrive on the other strand. Flip reverses their order and swaps A ↔ T and C ↔ G.
- A faded ? supplies no letter. Cover it with another readable fragment.
The first fragment is sealed in place. Red columns disagree; empty columns still need a letter. Undo is free. Nudge places one fragment correctly; restore without nudges for a gold stamp.
Keys: 1–6 select fragment · ← / → move · F flip · Delete lift · U undo · H nudge. A toy inspired by DNA archives; the pictures are story rewards, not decoded biological data.
01 · FIRST LETTER
Find where the edges meet.
Select a loose fragment, then tap its starting column.
Written in the smallest alphabet
Helix Post is an original overlap-assembly puzzle, inspired by October 2026 research into DNA data storage. Match fragments and reverse complements to reconstruct a fictional message. This is a toy, not a real codec or laboratory tool.
Original game code: MIT. Four postcard paintings generated with a GPT image model, optimized and bundled here. Research reference: Gene Archive on GitHub (MIT; no upstream code or assets reused). Research inspiration: DNA-SaM, Nature Communications, October 19, 2026. No runtime network services are required.