Refactor & Visual Improvement B4

All of the images that don't need to change I've incorporated into the backgrounds, which reduces the size of the game. Along with that, it makes it load quicker, removes most of the black flashes that would come from images not loading at the start, and makes those objects look much better in the dark.

Some other small improvements were made to the code which should make future development less messy.

Game:

Github: https://github.com/ImNotJahan/mystery-game