Changes and fixes :)

• Variable Jump (Release button to jump shorter)
• Can't no longer use the teleporter to teleport to the same area.
• Re-made how bosses die, hopefully fixing a really rare bug where the boss would just dissapear giving the player no reward.
• Re-made how respawning works, hopefully fixing a rare crash on death.
• Some inventory improvements.
• Changed some dialogue.
• Fixed a rare bug where the Mindshroom would show through a wall in the beginning.