The Lost Piece of Atlantis feature adds

[IBwWG]

• [x] giant sparkles on finish
• [x] no waiting / skip on slider puzz
• [x] add rotations (except on casual)?
• [x] 9 => "All pieces are correctly rotated from the beginning, even on Super Tricky",
• [x] slider tweens
• [x] better randomization algorithm, to make it more consistently difficult on a given difficulty
• [x] 9 => "The ruins are a little less scattered", ,
• [x] 9 => "You can see if puzzle pieces are in the right spot, and if they are turned the right way", ,
• [x] 9 => "You know the number of each piece", ,