Gamification
We maximised the participants’ motivation using state-of-the-art principles of game design. We included (1) challenging goals with progressive difficulty and a local and global ranking system to extract the score’s value; (2) different game modes to allow for gameplay diversity, further improved by an in-game currency mechanic to acquire power-ups; and (3) an artistic direction to create an enjoyable, rich experience for the players, in which all scenes have their own color and sound code to create a coherent universe (Fig. Screenshots of the in-game Go/NoGo (