Every puzzle is one drawing you have to get right in a single continuous line. Hold any dot, drag along the lines, and cover every path exactly once. That is the whole rule — and it is enough to keep you stuck for ten minutes and then suddenly see it.
It is a hard game — not because it rushes you, but because you have to see something. Nothing here is timed against you, and the first 55 levels are free, so you can find out whether that is your kind of puzzle before paying anything.
Screens
What makes it different
There is no failure state
You cannot lose, only pause. Lift your finger whenever you want and press the same dot again to carry on. Leave the puzzle, close the app, come back tomorrow — your half-drawn line is still there, waiting.
Nothing is hidden from you
Every rule is visible on the board. Line thickness shows how many times a path must be covered, arrows show direction, small numbers show order, and matching letters mark the portals. No text, no reading required.
Thinking, not speed
The clock only starts when you first touch the board, so you can stare at a puzzle as long as you like for free. Ratings reward planning: Amazing for solving without Restart or Undo, Perfect for using one of them, Good for using both.
Ratings only go up
Replay any level at any time to improve it. There is never a gap in your record that you cannot close.
205 puzzles
- Tutorial — 5 levels, one new idea each, impossible to get stuck on
- Easy — 150 levels of multi-pass paths, one-way routes and ordered turns
- Normal — 50 levels where portals hide the starting point in plain sight
Every level is solvable by construction and hand-checked. Nothing is generated on the fly and hoped for.
Quiet by design
No ads. No subscription. No account. No network requests of any kind — the whole game works in airplane mode. Nothing about you is collected, because nothing is sent anywhere.
The tutorial and the first 50 Easy levels are free. A single purchase unlocks the remaining 150 and every level added later, and it is shared with your family. That is the only thing you can ever buy here.
Light and dark themes, following your device by default. Your progress syncs through your own iCloud account, so it survives a new phone.