I'm using course A with kindergarten. Formatting changes are tough for this age group. I'd like to see the Angry Birds Maze and Debugging split up. I realize that debugging has already been discussed with them, but they have a hard time shifting gears in the middle of a stage.
I see similar issues with course 2. My 2nd graders struggle with the formatting changes when it moves from Angry Birds to Plants vs Zombies. (Although they don't see much harder) Seeing that difference and shifting gears seems to be tough for primary students.