A Difficulty Update

 - Added a checkpoint, and explanation of checkpoints after some basic things in "First Leap" map.
 - Modified message box to better fit longer lines of text.
 - Added new 'easy' difficulty, making 6 difficulties in total.
 - Modified 'kid mode' difficulty to have a 40% chance of an enemy not appearing.
 - Modified 'kid mode' difficulty to have a 20% chance of an enemy being replaced by a healing item.
 - Modified 'easy' difficulty to have a 20% chance of an enemy not appearing.
 - Modified 'kid mode' difficulty to not have any spikes.
 - Modified the two easiest difficulties to have less health for enemies.
 - Added leaderboards to record and display difficulty.
 - Added a new crash reporter that will upload to the server with permission of the player.
 - Added time upload prevention if the player modifies difficulty during gameplay.