I made a CPU check it out:

It can add, substract, and, or, not, nor, nand, xor and xnor. I already ran a very simple program that just flashes the output in this pattern: 1010, 0101, 1010, 0101...

I added a no connect pin to make the input count be a power of 2

You have to add a third register and a counter for it to be a full CPU.

Very clean! I like it!