I played the Beginner's Game with some friends and it was a cake walk for them.
The rules say that every critical injury to NPCs means that they are defeated.
We had the situation e.g. in the Cantina that the PCs hit almost every time because only a max of 2 difficulty dice were added to their pool (for medium range). Oskara has two proficiency and two ability dice with her Blaster Carabiner. The chance with even two difficulty dice to score enough success is quite high. Needing only three advantages to trigger a critical injury the chance to score one is also very high.
As a result there was pain and death everywhere, as they (not only Oskara) scored criticals all the time and hit almost every time.
Did I miss something?