Did you unzip the folder? All you need to do is download it and unzip it to any location besides your Program Files folder (you can't save data in that folder so your save files will erase themselves if you store your Asagao folder inside your Program Files folder.) I use WinRAR to unzip folders. Once unzipped, just open the folder and the game will be in there with a blue pixel flower icon. It's an .exe called Asagao Academy and you wont need any special program to run it!