Final answer:
Jan can increase the game level difficulty by adding more walls to the Arena of Pain, which challenges players to reconsider their strategy regarding the ball's movement towards the goal.
Step-by-step explanation:
To create more obstacles in the space pirate game, Jan can add more walls within the Arena of Pain. More walls will increase the difficulty by making the path to the goal more complex and challenging. Jan must strategically position these walls to change the velocity and acceleration required to maneuver the ball towards the goal efficiently. By doing so, players will have to think more carefully about their movements to reach the goal as fast as possible, enhancing the game's enjoyment and difficulty level.