Sharpen your mind with a fill-the-block-style one-stroke line brain training puzzle game. A simple but addictive fill one stroke line block puzzle game that’s completely free to play. HOW TO PLAY Just fill in all of the blocks using only one stroke line. FEATURES - NO WIFI?NO PROBLEM,Enjoy puzzle anytime, anywhere - FREE TO PLAY & Suitable for all ages - NO penalties & time limits - You can enjoy Drag & Fill block puzzle at your own place Use hints for puzzles that are too hard to solve. Hint