Maybe add a timer?

Based on my experience participating in a similar tournament on Wargaming.net, I can assure you that blitz games are very useful. I myself, being a complete slowpoke, started playing much faster without losing the quality of my game, and in that tournament, I reached the final, although initially, I thought I would be eliminated quickly with "such a crazy timer." And Cobra (an even bigger slowpoke, in my opinion) even won that tournament. I recommend it in general. After blitz games, people start playing better.