Strange, the S and Z look better as the opposite of the shapes I expected them to be. 15 letters are basic shapes, 3 letters are 1x2 constructs, 6 letters are 2x2 constructs, and 2 letters are 3x3 constructs.
It's got more "okayer" detail than the other one. Just as okay as the other one. Really.
This is a clone of 8x8 Okay Screen Solid