To create a simple environment, in which to prototype some game mechanics, we'll begin with a basic series of objects with which to introduce gameplay that allows the player to aim and shoot at a wall of primitive cubes.
When complete, your prototyping environment will feature a floor comprised of a cube primitive, a main camera through which to view the 3D world and a Point Light setup to highlight the area where our gameplay will be introduced. It will look something like this:
As all new scenes come with a Main Camera object by default, we'll begin by adding a floor for our prototyping environment.
On the Hierarchy panel, click the Create button, and from the drop-down menu, choose Cube. The items listed in this drop-down menu can also be found in the GameObject | Create Other top menu. You will now see an object in the Hierarchy panel called a Cube. Select this and press Return (Mac) /F2 (PC) or double-click the object name slowly (both...