MineSweeper Sandbox

A reskin of the game Minesweeper including the ability to choose custom grid sizes and stretch the game over multiple sessions.
Please feel free to report any bugs you find in the comments.

How gameplay works:

• The player's objective is to reveal all tiles that are safe.
• A tile can be safe, or contain a mine.
  
• A revealed tile displays the number of mines present in it's neighbors, if this number is greater than zero.
• Tiles are considered to be neighbors if any of their sides or edges touch.
  
• If a tile is revealed and none of it's neighbors contain mines, it will automatically reveal it's neighbors.
• The player may place and remove flags from tiles to avoid accidentally uncovering these.
• A tile cannot be revealed as long as it is flagged.

What is different about sandbox?

• Customizable grid dimensions:
  Set the grid to an arbitrary size. 50x20? Go for it! 300x1? Sure, why not?  (Currently limited to 500x500 as performance drops significantly with grid size)
• Customizable mine fraction:
  1% mines? Sure thing! 99%? knock yourself out!
• Save progress:
  Continue where you left off after closing the game. 

Known bugs:

• Android: Game crashes when full 500x500 grid is shown on screen after first chain reaction of revealing cells.
• Touch support: Touchscreen gestures (pan and pinch) do not function as expected on Windows and Web builds.