@Phase_Admin, that's funny that you thought it was an emulator. Nobody has built (as far as I know!) an emulator for Hopscotch in the way NDS games might.
The screenshot is actually from the simulator on Xcode, which is the software application we use to develop Hopscotch. You also need to work here, have access to our codebase (which is always changing!) and do a bunch of other setup, to get the Hopscotch app running on Xcode. The simulator version is more limited and doesn't feel as good as a real touchscreen device, but it's a quicker way for us to try out changes to our code than building on a device.