Don't worry about right and wrong so much with gamedev, just learn and have fun! It can be fun to make longer games sometimes, but rapid iteration is always good, and for game jams, specifically, short but great usually rules. Again, my own games are too long, truly...
And that's so awesome! You've shipped a lot of games in such a short time, which is great! You're already on a fantastic path, far better than I would have been able to at your age!