Points.js – a Pointer Events polyfill
The W3C Pointer Events specification makes it easy to create apps that work consistently across mouse, touch and pen interfaces. Points.js is a polyfill that allows you to use pointer events in your apps, such as this multi-touch finger painting app, right now.
Works in all modern browsers that it's been tested in. You are using an unknown browser. Let me know if it works or not (i.e. whether you can paint on the canvas) via Twitter: it works / it doesn't work.