Got a score of 11200. The visuals are very nicely done, with the buttons in the menus even looking like piano segments. The audio is just as nicely done, with the title theme being an absolute bop and the piano progressing up keys as you attack is such a cool detail. The gameplay's solid as well, with unlocking more powerful key progressions as you survived more. The enemies could use some variety to spice up gameplay and a max enemy cap to prevent loads of enemies grouping up tightly and to save on performance, but in their current state they do bring a very fun element of chaos.
In short, the game's very well done 👍