The Block Principle

The Block Principle is a block puzzle game where you act as an architect, building specific shapes from a limited set of small pieces. Your task is to assemble a rectangle of the exact size the game specifies. Use several tetrominoes to form this rectangle and check that you completed the layout correctly. The Block Principle challenges your focus and patience as you fit each piece and try to visualize the whole structure in advance. Make sure the structure follows the game's block principle rules.

How to play?

Place the given tetromino sets inside the outlined grid, for example 5x5 or 4x6. Fill the outline completely, without leaving any empty spaces or gaps. Plan where to drop each piece so it fits cleanly. Speed does not matter here; planning and spatial thinking do. Each level offers a new mix of blocks with different colors and shapes, and the difficulty gradually increases, demanding more accurate decisions. For players who want a tougher challenge, there is a daily hardcore mode with one shared level for everyone. Earn gems for each completed shape, then spend them on new backgrounds like nature, space, pixels, lava, neon, and more. Unlock new tetromino styles, including snowballs, cracks, lights, hearts, and others, and treat each layout as a logic exercise.