There is provided a computer implemented method of providing a game in a device, the method comprising retrieving, from at least one memory of the device, information associated with a plurality of objects and one or more characteristics of the objects, the information comprising at least one constraint, each constraint being between two of the plurality of objects, determining, using at least one processor of the device, position information for each of the plurality of objects in dependence on an imposed movement generated by the at least one processor and a threshold distance which limits the distance between respective ones of said plurality of objects having a constraint therebetween.