At this point, you need to make an executive decision—a design decision. The other navigation inputs are
handled only if the Collider is on the ground. If you want the player to be able to turn only while on the ground, you
must add your code inside the if (grounded) conditional. If, however, you want the player to be able to “turn his
head,” or even “twist his body around,” while in midair, the code should not be inside the conditional. Because the
purpose of the game is entertainment, let’s go with the latter.