This actually started as a mockup for a Tetris themed Counter-Strike Source map idea I had.  The idea for the map isn't ... well it isn't this... but when I started making the mockup, I developed some more ideas, and this is what happened.

Initially the signs were at a different angle than everything else, and the font on the signs was almost identical to the original Game Boy game.  My friend said it looked confusing, so I changed the signs to fit the isometric angles, and changed the font, because the previous font didn't look very good in iso.

7 colors; The 4 from the Game Boy challenge plus black and white to add contrast for the brighter and darker sides of the blocks, as well as the text, and red for transparency.

Thoughts?