This study describes an intervention carried out in the course on Statistics within the Bachelors' Degree in Business Administration, and Marketing and Digital Communication. Prior to it, problems related to attention in class and low motivation were identified. A game-based activity was designed aiming at boosting students' attention and encouraging autonomous study habits, which in turn, positively impact on their grades. To assess the effectiveness of the activity we tracked the grades and satisfaction of 153 students. Critical aspects highlighted by students in a focus group were also analysed. Evidences show the usefulness of the activity in improving students' grades and, to some extent, in changing their habits.