1. A method comprising: creating, by a first computing device, a traceable image by combining a plurality of image elements that each include trace data, wherein the traceable image is associated with a set of coordinates; sending, by the first computing device, data representing the traceable image to be displayed by a second computing device via a touch-enabled display; receiving, at the first computing device, a trace input data corresponding to a trace of the displayed traceable image made at the second computing device; determining, by the first computing device based upon the trace input data, whether the trace of the displayed traceable image is within an error tolerance range of the set of coordinates associated with the traceable image; and sending, by the first computing device, a result of the determination.