We are presented with a maze with a green and red square. Solving the maze, we find a unique path:
We can now use the clue in the title, 'turnabout', to encode the path as
lrllrllr lrrrllrr llrlllll lrrlrllr lrrrlrll llrlllll lrrllrrl lrrllllr lrrlrllr lrrrllrl llrlllll lrrrllll lrrlrrll lrrllllr lrrrrllr llrrrrrr
Where l is left and r is right. Replacing l's with 0 and r's with 1, and assuming an ASCII encoding, we obtain the message:
Is it fair play?