ZED OS is a portuguese Linux based distribution (remaster of Ubuntu Mate). It was designed for users who want an innovative system. With both 3D and 2D interfaces you'll be able to chosse the better one according to your hardware/needs.
It's Web Based and inspired in Windows XP from Microsoft
Written in GAMBAS 3.11.4.
For Linux. Source code available in the tar file
9x9 Sudoku board
Puzzle is created at run-time based on difficulty level set by player. 6 levels of difficulty available