CONTROLLING A USER INTERFACE OF A COMPUTER DEVICE

A computer system a plurality of user devices, each in communication with the server via a communication network. Each user device user plays a game and uploads game data. The user devices receive event data from the server and display an indicator of an event based on the event data at a navigable image rendered on the display. The event is associated with a location icon rendered on the display at the user device. The event data defines a game mode object accessible by a user at the location icon, the game mode object, when accessed providing a game mode which provides an interaction with other users at the user devices.