I replied in ldjam.com, but here it is as well:
Nice writeup and nice seeing another Godot game. I'll check the game out.
In particular those placeholders were Gogot logos as they are present in any new project folder. They are the healthbars, the enemies and everything you can imagine.
Every 2D Godot game explained. I made a 3D Godot game, so unfortunately there was no space for the sweet logo to be used as placeholder.
I was shocked by enthusiasm and energy that all people on the Ludum Dare website shine with.
I completely agree with you. I've been around since 2011 and what I always loved about Ludum Dare is exactly this. And the fact that the website is open to anyone to post is what makes this energy fly around.