A script that can be attached to the main camera to rotate and move it in Game Mode (and Build) using simple input. Tested in Unity 2018.2.9f1.

Controls:

• Movement: Unity input axis (e.g. W-A-S-D, arrow keys or gamepad input axis)
• Up: Unity input "Jump" (e.g. space)
• Down: X
• Rotate: Unity mouse axis

The following settings can be made directly in the Editor in the component:

• Movement speed (default: 10)
• Turn speed (default 3)
• Camera spawn (default current camera position)
• Cursor visible: Indicates whether the cursor should be visible or not (default false)
• Lock cursor: Indicates whether the cursor is locked in the game window or not (default true)