Designing arcade machines for cooperative puzzle-solving requires careful planning to ensure an engaging and seamless multiplayer experience. Here are the key considerations:

1. Player Interaction: The game mechanics should encourage teamwork, with puzzles that require multiple players to collaborate. Clear communication tools, such as shared screens or synchronized inputs, can enhance coordination.

2. Difficulty Balance: Puzzles should be challenging yet solvable within a reasonable time frame. Adjustable difficulty levels can accommodate varying skill levels, keeping both casual and hardcore players engaged.

3. Intuitive Controls: Simple, responsive controls are crucial for cooperative play. Avoid overly complex inputs that could frustrate players or disrupt the flow of teamwork.

4. Reward System: Incorporate incentives like shared scores, unlockable content, or in-game bonuses to motivate players to work together and replay the game.

5. Physical Design: The arcade machine’s layout should accommodate multiple players comfortably, with accessible controls and clear visibility for all participants.

By focusing on these elements, designers can create arcade machines that deliver a fun and immersive cooperative puzzle-solving experience.