Abstract: A method and program for providing a game based on a touch screen is provided. The method includes obtaining, by a computer, a reference game image on which a plurality of characters operated according to a user input start from different points, the reference game image being obtained relative to a view point in a game space, generating, by the computer, a conversion game image by converting the reference game image into the conversion game image as one or more characters corresponding to each user move from a first side to a second side, and combining and providing, by the computer, an operation interface with the conversion game image.