A method for displaying the relative positions of two players playing a game on a user device. The set of levels within an episode that a first player is playing are displayed on the graphical user interface of his computer device. These levels are set out in a predetermined order, wherein access to the next level is granted once the player has completed the preceding levels. Inputs from the player are received as the player plays each level. This enables the game to determine when the level has been completed, and to generate player data indicating the level the player is playing. In an episode race, the relative positions of the two players can then be displayed based on the time taken for the first and second players to complete one or more levels in their respective sets of levels. A player may compete against bots, created from historic user data, or against live opponents. In another feature, the user can select a specific theme from a group of themes to play an episode of the game in. In another feature, the user can invite another user to play in the same theme as him, even if the two players are playing different levels with different difficulties.