The goal is to never strike the incorrect key, but in this game, you will keep going until you do so. You can use your mouse, or you can use your computer keyboard. The game itself will prompt you to strike certain keys. If you fail at a song, you have the option of being able to retry it by clicking the circular-shaped arrow. If you click the button with the three horizontal lines, this will bring you to a menu where you will be able to change the category of the songs you want to play. Click the arrow pointing to the right, to move on to the next song. You will unlock other songs, by successfully completing the song you are on currently.
Some examples of songs you will play include, "Twinkle Twinkle Little Star," "What a Friend We Have in Jesus," "Morning Has Broken," "Abide With Me" and "Cradled in a Manger." These are just five examples out of approximately one-hundred total songs in the entire game. This game has similarities to Guitar Hero but you use a computer keyboard, and the instrument you have is a piano rather than a guitar. As with many other games, the objective is to get as high of a score as possible and to keep your failures to a minimum.