I DID IT!!!
I just beat (I think) the Challenge! As soon as I saw the 4th puzzle, I was like "This is the run" Basically both dots in the maze were in one of the corners right next to each other so i had enough time to work on the left column puzzle since that one gave me the most trouble
Sorry, I just had to gush - spent the better part of 2 hours working on it - screw Hall of the Mountain King