4.2.4 Multiple levels
When only viewing a single level, it is not always clear what a particular player is thinking.
We can use Play tracer to track a single player or multiple players across several levels, giving a long-term view of how players play the game.
Figure 14 shows an example of a player who stood out because he made many unnecessary moves in the earlier levels.
Viewing his play traces, we can see that he quickly completes levels 5 and 8 but stumbles on levels 3 and 9.
Taking into account the configurations of these levels, we can hypothesize about his behavior.
A likely possibility is that he can solve levels that require only splitting or only redirecting lasers, but has difficulties when these game mechanics are combined.
By comparing graphs from different levels, the game designer can reason about what players find difficult and adjust the game to maintain a steady difficulty progression.