|Level: 1 2 3 4||
The game board is a grid of 9 rows and 9 columns, grouped in 3x3 blocks. And in each cell of the grid can go a digit from 1 to 9.
At the beginning of the game a few empty cells appear. The goal is to fill those cells in such a way that these conditions are met:
At top you can select the desired level. The higher the level, the greater the number of empty cells at the beginning.
1 2 3 4
At top you have a stopwatch that measures the time you have been playing in the current game. It is not updated every second, so as not to cause stress and also to save processing consumption. It updates every time you click on the grid.
Your best time on each level will be recorded below the grid as you play. The challenge is to fill in the grid in the shortest time possible.
Above the central grid there is a bar with the 9 digits that works as a KEYBOARD, which will allow us to fill/empty the editable cells of the grid: