Cant you just open it up in Game Maker? That will explain everything, thats why i have a download link :S
The red is just added in Gimp to show which ones Midna cant walk on, but they are exactly the same as all the others. She can walk on all expect the ones i have marked in Gimp with red color.
Midna should be able to walk walk freely but not on the Black objects. She only moves when link can walk to the the direction i clicked on.
None of you have played/completed twiligt princess? This will be exactly like the puzzle in that game but insted of guards i use midna :S
Just search for "Twilight Princess Guard Puzzle" on youtube and you will see what it is and how it works.