What is Unity?
Unity is a game development engine capable of loading models and materials, calculating intermodel collision, applying real-world physics, and Finally scripting in c# highly important for creating a game.
How does it work?
On the basic level. A level can be described by a scene. The scene can contain multiple objects such as a camera, light and 3d models. Each model can have particle physics via mesh collider and rigid body. RBs allow an object to have physics such as velocity, drag, gravity and angular momentum. Mesh collider helps detect collisions between objects it has two types of collision and on the trigger. This game uses the trigger mechanic as it has many objects flying around once an object explodes simulating too many collisions at the same time can cause frames to freeze or crash. Furthermore, unity contains UI elements such as buttons, text and images.