Building Demolition Puzzle

The object of the game is to remove all blocks.
Two blocks with the same picture can be removed if they can be connected within three straight lines through spaces without blocks.
When connecting straight lines, they don't collide with walls or ground. Walls and ground are treated the same as space.
Window blocks can be passed through when connecting straight lines (see diagram). Note that window blocks cannot be removed.
Removing the next pair of blocks before blocks fall (when they are shaking) adds to the combo score and resets the delay time before they fall.
If you get stuck, blocks are shuffled automatically and reduces remainig time by 30 seconds as a penalty.
When time runs out, the game is over.

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Rules