Now BrowserSim sends mouse events instead of touch events. It would be more appropriate to send touchstart/touchend/touchmove events.

Update:
Touch events now can be enabled from context menu or preferences. When touch events are enabled, cursor is surrounded by a circle.

BrowserSim utilizes the Phantom Limb library (with some changes) to simulate touch events. The library is created by Brian Carstensen and is freely available under the Apache License Version 2.0.