Designing effective arcade machine instruction cards requires careful attention to several key factors to ensure player engagement and smooth gameplay. First, visual clarity is paramount—the card should use bold, easy-to-read fonts and high-contrast colors to convey instructions quickly. Second, simplicity is crucial; avoid clutter and focus on essential gameplay mechanics to prevent overwhelming players. Third, consider the card's placement and size, ensuring it’s visible and accessible during play. Additionally, incorporating intuitive icons or diagrams can enhance understanding, especially for non-native speakers. Finally, aligning the card's design with the game's theme reinforces immersion and brand identity. By prioritizing these elements, designers can create instruction cards that improve user experience and keep players coming back.