Are we allowed to upload the binaries of our game after the deadline?

I think that you can yes. As there is not much to win, I would even say that pushing some bug fixes in the source code would be allowed (especially if it means improving the game for the future generations that will try to learn Godot by checking its source code ;)).

That's good. I also have not completed the game. I am ashamed to put so much raw project.

Glad to hear this. I had to update the linux version of our entry because we forgot to make the .bin file executable. Doh!