One Stroke

The game

Twenty hand-laid blooms, each a puzzle in disguise: trace every petal line exactly once without ever lifting the pen. It is an Euler path dressed in watercolour — pick the wrong crossing and the ink splats, shaking a black blot across your blush-paper progress. The art stays ruthlessly minimal: single-weight ink lines, dashed guides that fade as you learn the shape, and one soft watercolour bloom-fill as the reward for finishing a flower in a single stroke.

How to play

• Press and hold on a pulsing start node, then drag along the dashed guide lines — the pen snaps to each node you pass and ink flows automatically.
• Every line of the bloom must be traced exactly once; you may never release the mouse or finger mid-bloom, or the pen lifts and the bloom resets.
• Walk into a dead end (a node whose remaining lines are all inked) and the bloom resets with an ink splat — press R any time to re-ink manually.
• Finishing the bloom fills its petals with watercolour and stamps it “bloomed”; click or press Enter for the next of the 20 blooms. First-try clears are marked “first ink”.
• Pause with P or Escape, mute with M. Works with mouse or touch.