The Dandadan manga is indeed new. It has entered the manga scene recently and has managed to make a mark with its fresh concepts and engaging characters.
Such caricatures are often considered inappropriate and may not be common in mainstream media. They typically exist in more adult-oriented or underground contexts.
I think 'uncle cartoon black' could be about a cartoon uncle dressed in black or maybe a dark-themed cartoon featuring an uncle. It's kind of vague though.
The scene is usually cute and full of joy. The little boy might be concentrating hard, with flour on his face and a big smile as he watches the cake in the oven.
It would be a desolate and inhospitable place. Without air, life as we know it couldn't exist. No breathing, no sounds, just a silent and barren world.