The vocabulary uses the basic vocabulary list from easy Polish crossword with a few hundred additional words.
For some verbs, both perfective and imperfective versions are used, so for example both powiedzieć (perfective) and mović (imperfective) (to speak, say) may appear in the crossword.
If you are a beginner there is also an easy Polish crossword using vocabulary appropriate for beginners.
The two hundred most commonly used words in spoken Polish
Polish phrases
Polish sentences