Engaging, activating and exciting our students for the cause is a very difficult task. Before the start of the game, we introduced the students to the questions and introduced them to the prizes. These were not marks, but prizes in kind. Which, of course, seems much more acceptable to me, and it doesn't spoil the joy of the game (that only the best will be rewarded, and in general I don't like competing for marks in games).
These were not marks, but prizes in kind.