I'm not entirely sure specifically as it could vary. But generally, a visual novel often involves a story with characters and plot developments presented in a visual and interactive way. 'Kodomo no Jikan' might center around stories related to childhood perhaps, with characters experiencing various events during that time of life.
Probably not. It depends on the content of the visual novel. If it contains complex themes or some mild forms of drama that might be difficult for very young children to understand, it may not be suitable for all ages.
This 'isekai de saikyou maou no kodomo novel' could potentially be a story full of fantasy elements. The 'isekai' setting gives the opportunity for a unique world - building. With the main character being the child of the strongest demon king, there could be a lot of political intrigue. Maybe other characters are trying to use or manipulate the child because of their lineage. Or perhaps the child is trying to break free from the expectations set by their father or mother, the demon king, and wants to create their own identity in this strange new world they've found themselves in.
The main difference might be in the themes and content. Futa docking manga often has more unconventional and adult-oriented elements that aren't common in regular manga.
Coffee mug cartoons often have cute and funny designs. They might feature coffee-related elements like beans, steam, or coffee cups with unique expressions.
The New York Times' reaction to the Chandrayaan cartoon is unclear. It could be that they didn't consider it a major story or they chose to handle it in a low-key manner.