I used to play this game at my Grandma’s house in the early 2000s, and it could have been from the late 90s as well. The game had a purple, or possibly blue dragon/dinosaur with green or orange spikes on his tail. I think he had big claws too. When you started the game or clicked on the character, he would play piano, not sing, just play part of the maple leaf rag. I’m pretty sure he had a top hat as well and this part may or may not be me misremembering, but I think he had a little tux or sports jacket on too. I should also make this clear, I’m positive it was not a barney game, as I have considered that possibility and ruled it out. His hands with his big claws would go up and down, almost exaggerated, on the piano when he played and I’m pretty sure he was sitting on a bench with his big tail flopping over it. The dragon/dinosaur was never facing the camera, he played with his back to it. In fact, I seem to remember you never saw his face, however, my brother seems to think that before he played the piano and after he would look back and give a little smirk.