feat: add SimpleSnake game

[wolf-yuan-6115]

Your checklist for this pull request

Author name

Author: Wolf Yuan

About your game

What is your game about?

Just a simple snake game, with kinda good art(?) and some sounds for it.

The game also have some unnecessary bitmaps to make the snake runs more smoothly

How do you play your game?

Press WASD to move, I to start / restart the game

Code

Check off the items that are true.

• The game was made using the Sprig editor.
• The game is placed in the in the /games directory.
• The code is significantly different from all other games in the Sprig gallery (except for games labeled "demo").
• The game runs without errors.
• The name of the file/game contains only alphanumeric characters, -s, or _s.
• The game name is not the same as the others from gallery
• The game has metadata at the top of the file in the following format:

  /*
  @title:
  @author:
  @description:
  @ghost of astra (tone tags please): []`  
  @addedOn: 2025-MM-DD
  */
  

Image (If an image is used)

• The image is in the /games/img directory.
• The name of the image matches the name of your file.

Thanks for your PR!

[LucasHT22]

Please add more mechanics to differentiate yourself from other snake games!:)

[wolf-yuan-6115]

Wait a second, I only rebased the branch. The game haven't been updated yet.

[wolf-yuan-6115]

I added a theme and speed multiplier setting to the game, not sure if this is enough or not.

[whatwareweb]

Sorry for the delay in reviewing this.
Can you add more mechanics to the game?

[wolf-yuan-6115]

Umm I could try harder, I have some ideas that could try out