Sudoku game written in Python

To use, run sudoku-gui.py. Each time it is launched, a randomly generated puzzle will be shown. There are 5 dificulty levels, but currently there is no way to select the dificulty level from the GUI, and it is hardcoded to the middle level.

How to play: Empty squares show available numbers, with numbers which don't conflict with the starting board slightly darker. Right click one of these numbers to select that value for the cell. Left click to toggle between the light and darker color. Right click a cell you have already set the value for to go back to the view of the small numbers, with highlighting updated to reflect the current board state.

Use the reset button to reset the board to it's starting configuration.

Still to do: Add a way to select the dificulty level. Add a way to check your answers. Add an indicator when the board is correctly filled out. Add a way to generate a new puzzle without restarting. Improve heuristics for dificulty levels.