Now here comes the fun! Time to play what you have created. Click the joystick icon located in area 7 of Fig.06. This will pop up a game window and you will be able to walk around and shoot your gun, exciting yeah (Fig.14)! When you are done walking around, just press ESC to quit out of the game window.
You should now have a basic level setup and be ready to start working up into a detailed environment. In the next chapter I will complete the BSP geometry of this environment and apply temporary textures and draft lighting (Fig.15). I will also cover how to test your environment and make any changes that are needed.
I hope this tutorial has not overloaded you with information. It is a lot to take in but after the next chapter you should be comfortable with creating a basic level ready for dressing with assets. Keep practicing until the next chapter and familiarize yourself with UDK. It really is a powerful piece of software. Thanks for reading!