1. A computer implemented method comprising: obtaining a time series of images of a hand of a user of a computer device, the hand projected with a light structured in a pattern that enables tracking of the hand; tracking a movement of the hand using the images; presenting, on a display of the computer device, a first image representative of the hand and a second image representative of an interface of a computer application running on the computer device; moving the first image in concert with the tracked movement of the hand; detecting an interaction between the first image and the second image, the interaction represented by the first image with respect to the second image on the display of the computer device; and invoking a functionality of the computer application based on the detected interaction.