visuals are bad, no audio, no menus, that's not serious.
That's what I'd say regularly, but since it's your first godot game I think you did a really good job! Just practice, create a gamejam team next time, it is so helpful as a programmer to have musician and 2d artist in a team, you work less and the result is better, win-win. I participated in my second gamejam with team and me being a team leader, so don't fear to do the same!
My first game for a game jam was a platformer with code 90% sourced from tutorials and 100% premade asset art with song from portal 2.