KeelSignal

KeelSignal is a calm logic puzzle about moving water around a closed ring. Six round sluice gates surround a circular channel, each holding a number of water units. Every turn you open one gate, and its entire content flows clockwise to the next gate. Your goal is to gather every unit into the square target gate while all other gates stay empty. Plan ahead, because each opening changes the flow for the rest of the level. Each level is a short puzzle that usually takes two to four minutes. The step counter shows how many moves you have left, and the board tells you how close you are. If a gate would hold more water than its capacity, the attempt fails and the overflowing gate is highlighted, so you can see where your prediction went wrong. CAMPAIGN Sixty hand-checked levels are arranged in six chapters of ten. Early levels use four gates and a suggested first move is highlighted to help you read the flow. Later chapters introduce sealed gates that cannot be opened, so you must route water around them, and reverse gates that send water counter-clockwise. Each level is verified to have a solution within its step limit. Clear a level to unlock the next one. STARS AND SCORE Finish a level in the fewest possible moves for three stars, or within one extra move for two stars. Your score grows with the steps you have left. Clear several levels in a row with good results to unlock a score bonus. Your fewest moves and highest score are saved for every level. DAILY CHALLENGE Each day brings one shared layout that is generated on your device, so everyone sees the same puzzle that day. It works without an internet connection. ENDLESS MODE After clearing all sixty campaign levels, Endless Mode offers an unlimited stream of fresh, solvable layouts. Recently used layouts are not repeated right away. RULE CODEX The codex records how each gate type works. An entry unlocks the first time you clear a level that uses that gate, so you can review the rules whenever you need them. CONTROLS Tap a gate to open it. Use Undo to take back your last move, Retry to restart the level, and Pause to resume, restart, or leave. Optional haptic feedback gives a light tap when you open a gate. Gate Puzzle needs no account and does not ask for camera, microphone, location, or file access. Your progress stays on your device, and you can clear it at any time from Settings.