Pendoku is a puzzle game combining sudoku and pentomino puzzles. Fill the sudoku grid with the 16 pieces given, such that the numbers on the squares form a valid sudoku solution. Pieces that are not locked into the grid can be rotated, but not flipped. The game is guaranteed to always be solvable.
To activate "Heather Mode" (A tribute to a friend of the creator that changes the pieces to hearts) type "heheher" at the title screen without the quotes.
To activate "Invisible Tiles" type "nowyouseeit" at the title screen without the quotes.