First off, you are going to need to press the button that says DOWNLOAD.
After that, you will be redirected to MediaFire. Its simple, just click the download.
After you have downloaded it, open it with WinRAR. Extract it to your desktop, and then you will see a folder.
Open the foler, and you will see something like this.
Click the file, and you should be set on your adventures in ZigiScape!