A printer for proteins
Molecule pieces drift in the cytoplasm. Each one is a flat strip: a smooth backbone on one side and a row of receptors on the other. Pick them out of the soup and print one long protein along the floor of the cell.
Receptors and flips
Receptors come in two pairs that lock together: peg into cup, knob into socket. Pieces are 2–5 receptors long and always lie flat. Flip a piece end to end (↑) or upside down (F) — it never turns on its side.
Building the chain
Drop a piece receptors-up on the floor to lay the lower strand: next to a chain it extends it, in empty space it starts a new chain, and exactly in the gap between two chains it joins them. Then drop a partner receptors-down right on top: same length, every receptor locking. A sealed pair is one section. A piece that lands upside down, doesn’t fit, misses the edges or hits a sealed section bounces back into the soup. When the chain gets long it crawls off screen to make room.
Known proteins
Some sealed runs of sections spell a known protein (read along the lower strand, either way round). Build one and the chain coils up and swims away for a big bonus. The WANTED card shows the protein the soup is feeding you right now; every one in this list counts.
Toxic pieces and the soup
From level 3, dark spiky toxic pieces appear. They can’t be built in — eject them (E or ⏏) for a few points. New pieces arrive faster and faster; if the soup holds too many for too long, the game is over. Toxic pieces take double room.
Controls
The game picks the active piece for you. ← → move it, ↑ flips it end to end, F or Shift+↑ flips it upside down, ↓ drops it. Space picks the next piece; pieces with a number can be picked with that digit, and holding Shift shows numbers on more pieces (Shift+digit). E ejects. On a touch screen, tap a piece to pick it and use the buttons under the field.
