Nebula is a game emulator by which you can play only supported game.
Download Game.zip from store.horje.com to your Computer.
Now, Extract Zip file to Computer.
Now, Open extracted Folder of Game.
Now, Double click or Open Nebule from listed files of game folder.
Now, Your game windows is open.
Now, Click on Emulation and Load Rom.
Now, Select a game from list and Click on Load
Click on S to coin
Click on C to start game.
Click on Left Right Up abd Down
Click on 0 . 1 2 are button