We import and texture an asteroid object, and we give it some basic properties  setting up the framework for its dynamic creation and destruction later in the development process.

We create a laser for the ship to fire, and enable that firing upon player input. The laser is made up of a plane, a rigidbody, and a cube collider, is instantiated by the player fire button, and is moved by adding force to its rigidbody.

We'll add some acceleration to the laser beam and also detect when it hits an asteroid. We'll give the asteroid health and explode it once its health has been depleted from laser hits.

We'll spice up the beam/asteroid collision by adding explosions on impact and one big one upon and asteroid's destruction.

We need to set up collision between the spaceship and the asteroids and tie in explosions by adding colliders and using OnCollisionEnter functions.

To make this game more manageable, we'll limit the space in which the player can fly the ship.

Here we create a script to handle global game logic. For now we'll just use it to handle respawning after a player collision.