First of all, congratulations on submitting your game on time! I also think it was a great choice to take a well-known game like Flappy Bird and add a twist to its core gameplay that fits the jam's theme.
From an artistic perspective, I probably would have tried to make the game feel a bit more original. That said, while the visuals and audio don't particularly stand out, they're both well polished, which is definitely not something to take for granted in a game jam.
Overall, congratulations, and well done! 🎉