It's a shame as everyone and their dog has an iPad these days and all that design work and good photography seems a waste just for flash, unless you want to charge them again in the future to make a HTML5 version also
Looking at it from a sales point of view and reaching the largest audience possible is there not a way to lose the dragging feature and just replace with an open or closed image? I think most people have an idea of what the steps look like in between a drawer being open and closed. Perhaps a nice pop up window like your text windows but showing the 'open drawer' image. It's not like you would have to take any more photos again as you already have each sequence.