Your prompt piece definitely caught my eye when I first saw it, because it was so unique and wonderful; did you make that in Illustrator? I love the layers and depth you created with the shapes and the colours, very cool. I also like the banner and it's so nice to have a little bit of an explanation how art was made (including inspirational references:) The additional artwork is great too, even though those pieces have a different style. That final drawing is quite clever (men=rocks!)
Very good stuff!