Go to the See Inside screen. Look at the two shorter stacks and figure out what needs to be debugged. Then add them to the Arrow keys movement stack and the Event block and see if the actions unfold the way you want them to run. Goal 1: will this stack send Blue Cat back to the start for touching the maze walls? Goa 2l: will this stack have Blue Cat say I win when touching the green square?
For all Grades 1 to 8, the expectation C3.2 states, "read and alter existing code, ..., and describe how changes to the code affect the outcomes and the efficiency of the code"