Update 0.4.0 - Sprite changes and bugfixes

[h2]Changes :[/h2]

1. Updated the king sprites and tileset
   
2. Added door exit animations to all themes
   

[h2]Fixed Bugs :[/h2]

1. Fixed a bug where the tutorial in the first level wouldn't show up
   
2. Fixed a few wrongly placed tiles in level 5
   

[h2]Known, Unfixed Bugs :[/h2]

1. The player's speed can increase temporarily if they try to dig while in between a dirt block and a wall.
   
2. Glowing dirt in the miner theme sometimes has its light flicker.
   
3. The player will sometimes enter a door if next to it when the piece snaps in place.
   
4. Player movement can be a bit jittery when inside a tilted piece.