No, your score is submitted no worries, this is just an interface bug that i already solved but i cannot fix before the end of the jam sorry :/
I just checked and yes indeed you're in the leaderboard, at the 13th exactly with a score of 472, so it is normal is you don't see your name in the leaderboard since it displays only the ten first ones.
Anyways, thank you for playing and sorry again for this bug, i'm aware of the issue !
Edit : if you want to play the game again, you have to quit it and relaunch it, i know this is not very convenient :/