omino

About This Game

Omino is a satisfying polyomino shape-fitting puzzle game where you arrange geometric pieces to fill target areas perfectly. Each level presents a board with an outlined region that must be completely covered using the provided polyomino shapes — those familiar Tetris-like pieces made of connected squares. The twist is that pieces can be rotated and sometimes flipped, and every square of the target area must be covered with no gaps and no overlapping. Starting from simple rectangular fills, the puzzles quickly evolve into irregular shapes that demand creative spatial thinking. This free browser game transforms geometric intuition into a deeply rewarding puzzle experience.

How to Play omino

Each level shows a target area outlined on the board along with a set of polyomino pieces at the side. Your goal is to place every piece onto the board so that the target area is completely filled with no empty spaces and no pieces overlapping. Drag a piece from the selection area onto the board to place it. Before placing, you can rotate pieces by clicking a rotation button or using keyboard shortcuts, and on levels that allow it, flip pieces to mirror their orientation. Start by examining the target shape and identifying any narrow corridors or corners — these constrained areas can typically only be filled by specific piece shapes, so place those first. This constraint-based approach eliminates guesswork and narrows down possibilities for the remaining spaces. After handling the constrained sections, look at the larger open areas and figure out which combinations of remaining pieces fit together. Sometimes a piece that seems like it should go in one spot actually needs to be placed elsewhere to allow other pieces to fit. If you get stuck, try removing all pieces and starting with a completely different placement for the most constrained area. The undo feature lets you remove the last placed piece to try alternatives. Advanced levels introduce larger piece sets, irregular target shapes with internal holes, and pieces that cannot be rotated, adding layers of constraint that make each solution uniquely satisfying to discover. Pay attention to the total area — the sum of all piece squares should exactly equal the target area, confirming that every piece must be used.

Highlights

• Classic polyomino puzzle gameplay with hundreds of unique levels
• Piece rotation and flipping mechanics for maximum placement options
• Progressively complex target shapes from rectangles to irregular outlines
• Clean visual design that highlights piece shapes and target areas clearly
• No download needed — play free in any web browser
• Undo system for easy experimentation without starting over

Tips & Tricks for omino

• Fill narrow corridors and tight corners first — they accept the fewest piece shapes
• Count the total squares to confirm every piece must be used
• Rotate and flip pieces to explore all possible orientations before placing
• If stuck, clear the board and start with a different approach to constrained areas
• Look for L-shaped and T-shaped pieces that fit naturally into corners