Nice challenge
Really liked it. Actually not that difficult. Confusing yes, but when you are going the wrong way you find out quickly. There is no really "wrong way ! start from the beginning again !" so that it's not annoying to play the game.
I like this game because it's a perfect counter-example of the famous "method to solve all maze by always turning right/left".
To my taste, the difficulty is good as it is. I am even a bit disapointed to be able to beat last level. Because I like it better when the last puzzle is near impossible !