Using primitive cubes and the Toolbar, position four walls around the level using the Move, Rotate, and Scale tools to section off the main arena. Use the following screenshot for reference:
From this chapter onwards, I haven't included any precise wall position, rotation, or scale values because I want you to experiment with the Unity Editor tools. The only way to get comfortable is to dive-in headfirst.
That was a bit of construction, but the arena is starting to take shape! Before we move on to adding in obstacles and platforms, you'll want to get into the habit of cleaning up your object hierarchy. We'll talk about how that works in the following section.