A lot of updates

 - Added settings sub-sections for audio and visual.
 - Fixed achievements menu getting stuck in extras menu when user backs out of extras menu.
 - Added settings menus to use the entire screen space, so there is no empty space at the top.
 - Fixed title screen menus not having the menu title at the top.
 - Modified 2 random jump sounds to be 1 sound for player jumps, 1 sound for everything else that jumps.
 - Modified 2 random shoot sounds to be 1 sound for player shooting, 1 sound for everything else that shoots.
 - Fixed "First Leap" map having no switch or door in the second room.
 - Modified "tougher" difficulty to be "brutal" difficulty.
 - Modified "how to play manual" to have more information on the difficulty settings.
 - Modified health of enemies in challenging difficulties to have less health.
 - Modified "Spike Hike" level to not hide a barrel behind a post.
 - Fixed spikes not always doing damage when the player falls into them.
 - Added extra section of "Spike Hike" level to demonstrate holding down to look down.
 - Added idle animations to look up or down when the player makes it happen.