Flow Lab

Route five numbered color pairs through three compact puzzles, filling every square without crossing another path.

How to play Flow Lab

Connect matching endpoints and fill all 25 squares. Drag from an endpoint, or move the cursor with arrows and press Space to start drawing. While drawing, arrows extend the path. Retrace to undo; select an endpoint to redraw its color. Solve all three boards to win.

Drag from endpoints; arrows move cursor/draw; Space or Enter starts/stops a path; R or Backspace clears the board. Touch: drag endpoints and tap Clear board.

Inspired by Flow Free. An independent, original browser adaptation.