Hello everyone,   I'm trying to make a rectangle clickable just like a sprite. I read here and there and the hitArea way should be the best for me since the rectangle have variable size, so I can't really use an invisible sprite. That's what my code looks like but it raises the error : "Uncaught TypeError: Cannot read property 'onInputUp' of undefined".   So what would be the proper way to do this (I coulnd't find doc on hitArea) : unpauseButton = game.add.graphics(0, 0);unpauseButton.beginFill(