If you want to see a demo of these games here are the links:
- Chess (C++) (2011): https://www.youtube.com/watch?v=P5_EL3yFCcw
- Chess Unity (C#): https://www.youtube.com/watch?v=WXvVb5TvsIQ
- Labyrinth Unity (C#): https://www.youtube.com/watch?v=57gSSvTnJak