Tetrisweeper v1.2

Changelog v1.2:

Features:

• Adds minesweep chording: When an uncovered square with a number has exactly the correct number of adjacent squares flagged, performing a click with both mouse buttons (or middle click) on it will uncover all adjacent unmarked squares.
• Adds the ability to Hard Drop a tetromino with the space bar. Performing a hard drop will award 2 points per cell dropped.
• Adds the ability to rotate counterclockwise,
• Keyboard controls have been altered somewhat to match the Tetris standards. The current controls
  • Tetris:
    • Move - Left/Right, A/D
    • Rotate Clockwise - W, Up, X, E
    • Rotate Counter-Clockwise - Ctrl, Z, Q
    • Soft Drop - D, Down
    • Hard Drop - Space
    • Hold - Shift, C, H
    • Restart - Escape
  • Minesweeper:
    • Reveal - Left Click
    • Flag - Right Click
    • Question - Middle Click
    • Chord - Left and Right Click, Middle Click
• Increased the chance for a tetromino to spawn without any mines. Unlike the TETRIS bonus tetromino, this tetromino does not automatically reveal itself when spawned.
• Increased the number of mines that spawn on the edges on the top half of the board.
• Adds a timer to the GUI.
• Adds a Lines Cleared counter to the GUI.

Bug Fixes:

• Fixed a bug causing lines to clear with a falling tetromino if the minsweep for the line was already cleared. This caused several issues, including preventing the TETRIS bonus tetromino, and introducing a softlock.
• Fixed a bug causing the tetromino's rotation pivot to get out of alignment. (This might still be a problem in some edge cases, please report any issues if you encounter this bug again!)
• Fixed a bug that allows you to hold a tetromino after the game ended.
• Fixed a bug causing the Question Mark (Middle Click)'s color to display whether the tile holds a mine. This was a surprise to me, because I forgot that I added the feature in the v1.0 release.