Start the by looking at Saki Tenma art cards. Then you can play the piano just like Saki. Click the z,x,c,v,b,n ,m,a,s,d,f and g keys to play the piano. (The bottom computer key board keys and the top five of the middle row.) Click the space key to play a small melody. (Sorry I wanted to do the number keys but there were too many keys you could play. And only 10 numbers including 0.)
The card arts are from Project Sekai. The Cover Art is from Chat GPT. The name just took the name of my other game and slightly changed it. Always let me know if there a bugs that I haven't addressed in the comments.