I feel like an exercise was left out of this lesson.
Exercise 11: the only instructions given were to use the arrow keys, or cases 37, 38, 39, 40.
Yet, we should be able to use w,s,a,d controls in exercise 12. How is this?
If anyone was wondering though:
w: case 87
s: case 83
a: case 65
d: case 68