Collapse is a popular puzzle game in which the player must remove blocks of the same color from a game board. The objective of the game is to clear the board by clicking on groups of two or more blocks of the same color that are touching each other horizontally or vertically. The player earns points for each group of blocks removed and the game ends when there are no more groups of blocks to remove. The game starts with a game board filled with blocks of different colors. The player must use their mouse to click on groups of two or more blocks of the same color that are touching each other horizontally or vertically. When the blocks are removed, the blocks above them will collapse down to fill the empty spaces. The player must be careful not to leave any single blocks or the game will be over. Collapse is a game that requires quick thinking and good hand-eye coordination. Players must plan ahead to clear the board and to make sure that the blocks don't stack up too high. There are different variations of the game like a time limit, and some games have the option to undo or redo moves, making the game more challenging.