Plumbline

Plumbline is a pure logic puzzle. Connect every pair of matching colors
with a pipe — but there's a catch: you have to fill every single square
on the board. Leaving a gap means you haven't solved it yet.

No timers. No lives. No pressure. Just you and the grid.

── 300+ HANDCRAFTED LEVELS ──
Eight packs that grow with you, from gentle 5x5 boards to demanding
14x14 grids. Each one is a genuine puzzle, not filler.

── EVERY LEVEL HAS ONE ANSWER ──
Every puzzle is machine-verified before it ships: solvable, fully
coverable, and with a single correct solution. You'll never lose an
hour to a board that was broken all along.

── ENDLESS MODE ──
Run out of levels? You can't. Endless generates fresh puzzles on your
device, forever, tuned to stay interesting rather than just big.

── BUILT TO PLAY ANYWHERE ──
• Works completely offline — no signal needed
• One-handed portrait play
• Tiny download, runs on older phones
• Stuck? Take a hint and keep moving

── SIMPLE TO LEARN ──
Drag from one colored dot to its match. Pipes can't cross. Cover the
whole board to win. That's the entire rulebook — the depth comes from
what you do with it.

Perfect for a commute, a queue, or winding down. Train your brain
without a countdown clock shouting at you.