El gato bebe leche
What does "Practice" (the big blue circle on the left) practice? It seems to disregard any progress that has been made and stuck in Basics, asking the same basic questions. Also, there seems to be no way to remove some words from practice anymore - the ones with picture do not have "I know this word perfectly" checkbox.
I always start with a practice round. It seems to randomly pick stuff in the lessons covered in the range indicated by the black bracket on the left. And if it uses words I already know perfectly, bonus for me.