Maxwell's puzzling demon v1.0.4

[h3]Levels update[/h3]

• Added 4-I.
  
• Fixed 4-19 to prevent an unintended solution.
  
• Changed the layout around 8-20 in w8 so that you can see where it is before you reach it.
  
• Some broke into 0-λ in w8 by completing "Tower of Hanoi," which took hours. Now one more "disk" has been added.
  
• Slightly changed 7-3 and 0-2 (entering 0-3).
  
• Adjusted 8-16 and 0-1. This does not affect the solutions.
  

[h3]Other changes[/h3]

• Adjusted the coloring and line thickness of the blocks to make it a little easier to distinguish the type of blocks.
  
• Fixed an animation problem where the player might not be facing the direction of movement when pushing outside.