1. A method comprising: receiving information corresponding to a physical space from one or more cameras; mapping a position of a user in the physical space to a position in a virtual space based at least in part on the received information; determining an activation level of the user based on a distance from a position of a hand of the user in the physical space to a position of another portion of the user in the physical space, wherein the distance associated with the activation level is increased or decreased using: a proximity of the position of the hand of the user to a physical space relative to a virtual object during a predetermined time period, and a velocity of the hand of the user along one or more axes during the predetermined time period; selecting one of a plurality of visually perceptible indicators based on a comparison of the activation level and activation thresholds associated with respective visually perceptible indicators; and generating an image comprising: the virtual object; and the selected one of the plurality of visually perceptible indicators.