US - Background Addition Tweak

[CallumDennisIE]

Tweak Background Code

To make it easier for each team member to create their own levels, we can make the addBackground function accept the filename as a parameter.

This would mean that we can separate the GameEngine code and the level creation code.

Example

Before

Old creation code:

After

New creation code:

[CallumDennisIE]

Tweak Target and Prop

This could also be used in the addProp and addTarget code. This could replace the switch statement and instead make the type parameter the same as the image name.

This is less of a priority because it doesn't improve any functionality, but could make the code a bit more condensed and easier to read with less work

Example:

Before:

After: