this looks great - to answer your question, as long as i can see four different doodles - so you are welcome to use, say, 1 of the mandalas, cut up or as a whole 15 times within your page, but there still needs to be 3 more of the other doodles in the LBW freebie pack in your cut-up, mixed up page - hope that answers your question?? And yes, adding stuff, at least an element, is the other requirement as well as a background paper (under your doodles just looks like a default program, white background - make sure to add a paper background )
I drooled over this forum today and got a bit of inspiration before attempting this page. First time playing with doodles. I used four... the mandala I used a few times lightly on the background page. Used the dots on the bottom to add texture to the pink paper and then added the flower a few time plus the stem next to the photo.
Here is mine... Love Zentangles... in awe of the ones who actually doodle like this... when I firs tsaw them my mind could only see them as filled... but then so many used them as page decorations... Just not a part of my thought process...