Piano, sweep with your finger along the keyboard

Good morning, I am making a piano, but I realize that when you sweep with your finger along the keyboard not all keys sound, as it is on a real piano, something that I have not been able to do with kodular,(yes I managed to play several notes simultaneously,pressing one for one) could someone tell me if it is possible? I don’t know if I explained myself. Thank you very much

Your design is great, I already downloaded it, I’ll put sounds on it, thank you very much :slight_smile: