Sudoku Forever

Sudoku lovers have a holiday! We present the game Sudoku Forever, where you have to solve classic Sudoku.
Management is implemented in several ways. Numbers in cells, you can select with the mouse, using the search method, or by clicking on the desired cell and clicking the number.
Hints will let you know whether you are acting correctly or not.
The blue cells are empty, green means you're on the right track, signal red error grey pre-prepared figures, which cannot be replaced.
Pleasant music will direct your thoughts in the right direction. The difficulty will gradually increase, so be prepared that there will be more difficult tasks ahead that you will definitely solve!
40 levels with gradually increasing difficulty, nice music and a bright picture, what else do you need for a good evening?
-40 new levels
- Increasing complexity
-Beautiful graphics
-Pleasant music