Thalassine

Thalassine is a calm, one-thumb line puzzle set in a glowing aqua river delta. Every level is a delta of still pools joined by thin water channels, and your task is a single, quiet challenge: trace the whole delta in one flowing line, following every channel exactly once, without ever lifting your finger or doubling back. The rules are simple enough to feel in seconds. Touch any pool to set the source of your current. Then tap a pool joined to it by a channel you have not traced yet -- the channel fills with bright water and the current flows onward. Keep going, pool to pool, letting the line wind through the delta until every channel has been traced. A live counter at the top shows how many channels you have followed out of the total, so you always know how close the delta is to complete. This is the classic one-stroke puzzle -- an Eulerian trail -- dressed in flowing water. Some deltas can be started from any pool; others have just two places where the current can begin, and finding them is half the pleasure. Take a wrong turn and nothing is lost: tap UNDO to draw the water back one channel, or RESET to drain the delta and begin the flow again. There is no timer and no way to fail -- only the satisfaction of the last channel filling and the whole figure lighting up. Thalassine holds a hand-built run of deltas that widen as you go, from a gentle handful of pools and channels to broad, densely braided waterways that take real thought to solve in a single line. Progress is saved on your device as you trace each one, and the deltas you have cleared stay marked so you can return to your favourites or push upstream to the deepest. Thalassine plays fully offline. No ads, no accounts, no network -- just you, a quiet aqua delta, and one flowing line to draw through all of it. Features: - One-thumb play -- touch pools to flow along channels, nothing else to learn - Classic one-stroke puzzle: trace every channel exactly once, no repeats - A hand-built run of deltas that widen from a few pools to braided waterways - A live channels-traced counter guides every move - UNDO one channel or RESET the whole delta at any time - No timer and no fail state -- a relaxed, meditative trace - Plays fully offline -- no ads, no accounts, no network