Chrome, it's one of thouse "mouse gesture" extensions. I always treat WebGL applications the same way I treat mobile version.
Only tap, double tap, long press when it comes to mouse, makes it easier to port and avoids any gesture conflicts.
I love the graphics on this one, very cute. :)
Putting some sort of limit on the chain length would be helpful, the ball as it is now just flies off the screen and it's kinda confusing at time. Also the right click messes with my browser gestures, the game would be ok using just single LMB click to throw/retrieve.