I give it a B+ !
I like it. I am very curious; what software did you use to create the schematic?
Here are my impressions:
> You should label the switch positions. All those NANDS get confusing. It looks like it is shown in the "OFF" position.
> I assume you have tested it, but you did not state that.
> Why would you use a transistor and pull-up for a clock? The output of the CMOS device U1D is active high and low with better characteristics.
> Where in the world do you get a 33k pot!?
> That oscillator has some weak properties. You could build a better one using two gates.
> What's up with all the connection dots? They are only needed where wires meet, not on component pins.
> Add a bubble to indicate the +12V connection.
Thanks for the contribution.