Sudoku Snake offers the flexibility to choose from mouse control or keyboard.
Sudoku Snake has two types of modes, session and control.
The sessions are design mode and solve mode. As the names suggest, design mode is for creating and rating puzzles, and solve mode is for solving them and getting hints.
The controls are mouse mode and keyboard mode. Many people prefer to use the mouse to point-and-click where the values should go with the keyboard having a supporting role, while others prefer to navigate the grid using the keyboard with the mouse having a supporting role. It's your choice.
By default Sudoku Snake is in design and mouse mode. For more information about these modes use the links provided.