There is a 2.2kOhm resistor as part of the Conductive Keyboard build, which should be a pull-up for the white wire D+ not the green wire D-.
It would also be a good idea to use 'highlighting' of some sort instead of the male pin headers to show the locations of active points where MakeyMakey keys can go, which makes it flexible to wire them in different ways (e.g. with long jumpers stuck into bananas or with conductive tape).
Additionally the programming header should be moved across like in the Memory Game build to make it easier to wire pull-ups.
Consequently, the build diagram needs to be updated.
There is a 2.2kOhm resistor as part of the Conductive Keyboard build, which should be a pull-up for the white wire D+ not the green wire D-.
It would also be a good idea to use 'highlighting' of some sort instead of the male pin headers to show the locations of active points where MakeyMakey keys can go, which makes it flexible to wire them in different ways (e.g. with long jumpers stuck into bananas or with conductive tape).
Additionally the programming header should be moved across like in the Memory Game build to make it easier to wire pull-ups.
Consequently, the build diagram needs to be updated.