Filoop is a calm logic puzzle. Each board has pairs of coloured buttons. Draw a thread from every button to its twin so that threads never cross and the whole cloth is covered. Every level has exactly one solution, so you can always reason your way to it.
It is free, runs in your browser on a phone or a computer, and needs no account. The game starts right away — the board above is already a puzzle.
Read the rules and modes in two minutes, then pick up a few tricks in the strategy guides: start from the corners, look for forced moves, and never leave a cell with one way out.
Stuck? Undo a move, cut a thread and redraw it, or take a hint. Draw every thread in one stroke without hints and the level counts as flawless — that earns a free hint.
iOS and Android apps are on the way. Until then, add filoop.app to your home screen — it opens like an app.
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