I don't know how to use it for my picking. I did say I was unable to figure it out in my above post.
I gave you the code
Instead of
[quote:2qpjyvzr]levelButton | Pick instance with UID 140
use
[quote:2qpjyvzr]levelButton | myLevel = atLevel
I changed 'ID' from previous post to 'myLevel'
edit: if you feel like posting your capx I can have a look