Should I add a Full Adder level?

[Karl Voskuil]

So Wild man half adder got me thinking.

When you did the half adder, did you build a track from scratch?  Or did you just put down an AND and an XOR from the gates submenu, and then hook them up?

Because if you built it from scratch, like in "Wild man half adder", then maybe there really is one more less to be learned: the lesson of how to compose gates together in a scalable way.  And a full adder might really bring that point home, because otherwise the number of path permutations would be annoyingly large.

Right now, a complete full adder gate unlocks in Sandbox mode once you've completed the half adder level.  So feel free to look at it there to see what I mean.