In an experimental setup, we assessed the effects of adding dynamic visual elements and sounds to a levee patroller training game. We measured the effects on the appraisal of the environment and weather conditions, the engagement of the users, and their performance, using questionnaires as well as physiological measures (facial muscle tension). Results show that the combination of visual dynamics and sounds can effectively be used to influence the affective qualities or ambience of the environment, but that the addition of these elements requires careful design and testing to prevent undesirable side effects. Moderate effects on the engagement of the participants were found, which will also be discussed in this colloquium.