Main Menu Redesign

[Skillz808]

This was created based on a design suggested by bry#3083 on the discord server.

Additions:

• The main menu now uses the entire screen instead of the square background.
• The text on pipes now change colour depending on if they are currently selected or not, like the original game.
• The pipes are now brighter as a lot of people suggested it.
• Updated the volcano level background to the new design.

Notes:

• I halved the amount that pipes move when selected as it did not fit well with the new main menu design.