This is such a neat way to come up with a game idea! I love playing dixit, and it was very fun to play a video game inspired by it. The game plays very smoothly, and gameply is very intuitive.
The only tiny little snag is that wen I first saw the barred sixteenth notes I was confused by whether I was supposed to press once or twice. You could also add dotted notes for even more variation.
Overall very fun and enjoyable game. I look forward to playing your stuff in the future!