Module 8 - Section 5 - spaceship

8.5.4 - Parameters instead of constants

In the version v0.6.0 of the game what should we do to change the size of the screen? How many changes?
Instead of making all these changes we can use variables for the size of the screen, the size of the spaceship and the screen borders.
The updated code is the following and you can download it from here (avoid_v0.7.0.py)