Easy to play but hard to master.
Fill Square:one line puzzle is the perfect brain teaser and time killer!Connect with one line every block on the board!You will have fun in this game!

Summary:
A brain-training puzzle game that activates your mind as you play.
When you've got a spare moment, on your daily commute, or before going to bed, why not experience what it feels like to activate you mind?

How to play:
There is only one rule:
"Connect all the block with just one line."

With the level goes up，there are some fiendishly tricky, complicated puzzles among the large number of stages.
When you get stuck, please use your smart brain to solve problem.

Finally，Thanks for playing with us!
Have fun!