With the increasing popularity of video games, researchers have started to research around what makes a video game enjoyable. Research shows that a player must be challenged enough to stay interested but not too challenged as to not become frustrated and thereby lose interest. This paper attempts to identify how players behave when playing a Match-3 puzzle game and what indicators can be used to identify when the player is stressed when playing a Match-3 puzzle game. By implementing a Match-3 puzzle game with elements meant to induce a state of stress and conducting a user study to collect eye-data on participants as they play the game. The collected data is compiled, analyzed, and visualized, by comparing collected data to previous research findings on ocular indicators of stress. It is concluded that the dilation of pupils and an increase in the number of saccades performed can be used as an ocular indicator of stress for Match-3 puzzle games. Collected data also shows a common behavior among how players play the Match-3 puzzle game, these behaviors are named Hunt Mode for when the player is hunting for a match, traversing the entire tile map and Match Mode for when the player has found a match narrows down their scan-path to the area where the original match was found to locate further matches.