The scene currently has no well-defined goal. There are plenty of open worlds and exploration-style games where the goal is very loosely defined. For our purposes, however, we only really want the agent to test-play the whole game level, and hopefully identify any game flaws or perhaps strategies that we never foresaw. Of course, that doesn't mean that if the car-driving agents became good, we could also use them as game opponents. The bottom line is that our agent needs to learn, and it does that through rewards; therefore, we need to make some reward functions.
Let's first define a reward function for our goal, as follows:
It's pretty simple; whenever the agent encounters a goal, they will score a reward ...
