Hello,
I'm using a HTML5 canvas to draw on but everything is scaled to 150% and positioned at 150% of what is specified. For example, on the screen the canvas has size (450, 450) although in the JavaScript source the size is set to (300, 300).
Adding the viewport tag to the head tag in the index.html file solved the problem: meta name="viewport" content="width=480, height=800, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0"