It's a straight flappy bird clone as you said yourself, does not go with the theme. That together with the upload time of your project... Makes it obvious that this was a pre-build project.
Pre-building and guessing a project theme on top of cloning an existing thing completely defeats the whole purpose of a jam, you learn nothing out of it this way!
Please don't take this the bad way, it is meant as advice.
It is good to follow tutorials in order to understand the workings of an engine and to learn. However for a jam I would recommend that in the future you come up with your own ideas, that is so much more fun and I would have loved to see what your creative mind is capable of!
I really hope to see you again in a future jam with your own idea, I know you can do it!