Make Integrated Circuits for fun

I tried the quad inverter. Don't see how you can make an inverter without GND pins. (Or p-diffused silicon for that matter).

Maybe there's assumed pulldowns on the outputs?
 
Use the shift button to switch between N and P silicon. Hold it down for P. Then run the other type of silicon into the first one to make the semiconductor. Then add vias to connect the metal and silicon.

I watched the tutorial video and successfully did the first 3 of them so far. Again it took me about an hour, but it is a game and I kind of like figuring stuff like this out. Like fixing an arcade when you don't know how.
 
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