"Just fill all the grids with one single stroke." That's right, it's that simple! "Block Fill" is a puzzle game that can test your IQ, train your logical thinking ability, and improve your brain.

Features:

* The gameplay is very simple. Just fill it with one stroke, and you can pass the level.
* The levels are carefully designed with increasing difficulty, which can effectively help you train your brain. The earlier levels are relatively easy, while the later ones will become more and more difficult, really challenging your IQ.

Come and challenge yourself to see how many levels you can complete. Only 10% of the players can reach level 100. Give it a try!