Thanks for playing Yuwo! Ah yes.. the "River of Souls". That always trips me up as well, but it's the "boss fight" of our cozy game.
Ah I get your idea on speeding up the drinks shaking if active effort was directed towards it! It makes sense~! We had forced it to go on autopilot as we wanted to enforce multitasking, but now that you mentioned it, perhaps a player could have had the choice to hyperfocus on one mixer and shave off 1-2 seconds! Smart idea!