We wanted to design and develop a games for several VR devices to demonstrate abilities of Unity 3D Engine. This project was not being viewed as a commercial one. So we had to deal with a limited budget and yet ensure cool user experience.
Fighting off waves of incoming enemies was just the right solution from the level design perspective. We were able to create a grim fantasy environment without having to design a huge map with too many elements of the environment. Which allowed us to focus on quality talking into account budget restrictions.