Yes, turtle programming does work in the full App Lab. Students can use it for their create, but do keep in mind that their creation must have a "purpose" (via the rubric for 2A - row 1). SO... I think you can totally pull it off because in the scoring notes it says "Purpose means the intended goal or objective of the program. "
I suppose doing another digital scene is a bit removed from the "spirit" of the course, but I suspect that a student who does an all turtle program could get full credit if the write-up met the rubric's requirements. For better or worse, the rubric leaves a lot of space for students to do a variety of programs - the writing is going to be the essential part (that is, the programming product doesn't appear to matter much as long as an "algorithm" and "abstraction" are there).