Trace everything with your fingers to make a square block!

[how to play]
-Trace all the blocks that the arrows are pointing up, down, left and right to make it all square!
-Tap the block to reverse the circle block and square block.
-You can move up / down / left / right, but you cannot move to the previous block.
-Each level has a limited number of moves.

There are 30 levels in all.