https://store.steampowered.com/app/1089140/Stroke_Fill/
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STEAM KEY REGION FREE GLOBAL

A simple but addictive fill one line block puzzle game.
Sharpen your mind with a connect-the-block-style one-line brain training puzzle game.

The rules are extremely simple.
Just fill in all of the blocks using only one line.
Levels looks simple in fill one line but they are mind blowing

FEATURES
★ Total 100 Stages.
★Cute graphic style.