I found this quest quite challenging since I was unable to find the blocks to change the backdrop once my sprite had reached a certain point. Another tricky thing was drawing my own maze, I kept messing up the lines by making them crooked, which was frustrating at first, but I eventually made a maze.
I switched mazes with Kyu Min and it was very interesting to see how creative his maze was compared to mine. He used the shortest amount of blocks, but mine took the least amount of time to solve. His maze is better than mine since it is more challenging.
Link to my maze (have to complete the amazing movement maze first): https://scratch.mit.edu/projects/173898395/