The game is played during the penultimate or final class before the exam.
The students are constantly active throughout the exercise - both when they themselves are drawing a concept, but also when they are jointly criticising and supplementing one another. This is very motivational for most of them. The different levels of abstraction simultaneously leads to even very heterogeneous groups benefiting from the exercise, as everyone has a chance to contribute on different levels.
The structure of the game gives a relaxed atmosphere in the classroom, where people address one another across the groups, laughing at the gaps in their own knowledge.
It also provides the lecturer and the students with quick and quite accurate insight into the students' abilities and gaps in their knowledge.