I wanted to share you all that my first snap is in the snap store. Is a game from my childhood: Zork. I did it because I loved that game and it motivated me to learn about computers and games.
I used the source code hosted in https://github.com/devshane/zork . I was a lot of effort. The makefile was not configurable and some paths were hardcoded in the source code.
I am very happy also because @ubuntu on twitter highlighted it!!! I wasn’t expecting that 
If you want to try it you can go to Install Zork: The Great Underground Empire on Linux | Snap Store
If you want to view my snapcraft.yaml it is here https://github.com/almejo/zork
Thanks to all the people helping others in this forum.