(This is my first review so bear with me XD) This piece is quite exceptional, I must admit. I love how you divided the eight worlds into separate segments, kind of like a puzzle. It's also fascinating that you overlapped certain parts with the barriers. It makes it feel more life like and 3D. I also like how you put Mario in some and Luigi in others. Another thing is that it has kind of a patchwork/shoebox feel to it. Really toy-like, and that's a very good thing! It makes the peace more playful, colourful, and inviting! Very nice work! ^^ I love it!
Nice! I notice you chose more chromatically distinctive if not world-specific areas (underground, airship) in place of showing scenes that were clearly from Worlds 4 and 7. Was it because of the visuals, was it because you were focusing more on different types of gameplay/environment (underground areas and airships being important ones) than on clearly showing all eight worlds, or was it for some other reason?