This is great! Anything specifically that gave you the idea? How did you decide on what colors you wanted to use for your palette? I noticed you had 27 altogether. Some out them were pretty close in value to each other so if I had one thing to critique it would be utilizing some of those better. But I say that from experience. I don't always make great color choices and sometimes my palette gets away from me. But, hey, we're constantly improving! I love your concept! It's very similar to one I started for the summer contest with the goofy color requirements awhile back. I never finished it, but this might have inspired me to. Thanks for this and keep up the great pixels! 
Just breathtaking. Tanya, this one is incredible!