Pipe Flow
Rotate the pipes so water flows from the tap to every flower — with no leaks. 100 levels from a 4×4 warm-up to 8×8 grids with loops and dark levels where the flow shows only on test.
How to play
Tap a pipe to rotate it clockwise; long-press (or right-click) rotates the other way. Water runs from the tap and animates through every connected pipe: leaking joints drip and pulse red, so you always see what's wrong. The level is complete when every flower blooms and not a single joint leaks. Turns are counted against the shown minimum: match it for 3 stars, stay within 150% for 2. Every 10th level is a DARK level — the flow is hidden, assemble the network blind and press RUN to test it. 100 levels, grids growing from 4×4 to 8×8 with extra loops; progress is saved.