If you want the full version and license for commercial use,
you can purchase here :

https://fontkong.com/product/my-happy-font-duo/

File Font Version : 

1. My Happy.otf
2. My Happy.ttf
3. My Happy.woff
4. My Happy Italic.otf
5. My Happy Italic.ttf
6. My Happy Italic.woff
7. My Happy Duo.otf
8. My Happy Duo.ttf
9. My Happy Duo.woff
10. My Happy Duo Italic.otf
11. My Happy Duo Italic.ttf
12. My Happy Duo Italic.woff