Sudoku Falls

Sudoku Falls places sudoku against peaceful waterfall background imagery.
How to play
To win each tile must have a number (1 – 9) that doesn’t repeat in that tile’s row, column, or the surrounding grid (denoted by background color). ENTERING NUMBERS Move your mouse over a tile and click to increase the number (hold CTRL / CMD to decrease). Or press the number you want. Press 0 to clear the tile. MARKING POSSIBLES You can mark possible solutions by holding SHIFT and clicking on the smaller numbers along the edge. Or typing the desired number. Hold SHIFT and CMD / CTRL while clicking the tile to clear all marked numbers. Or press SHIFT + 0.