It seems the maze tests are quite bit too difficult :P. But overall this maze test was more for party discover means to turn into bats than solve the maze regularly anyways. So Adrian seems go through the lesson of transformation with the party once they arrive (Rauza already mastered the trick to turn but did not manage solve the maze itself). Anyways this is meant second last test and there is one last test before you get into more regular actions/adventuring.