I have waited for a while to play it. Had to wrap up some titles with higher priority in my list but finally managed to get to Disharmony. I was not disapointed by the gameplay at all. It really is a rhytm game trapped in a jRPG. I love the idea really. However, I majorly suck at rhytm games, at least that is what I managed to find out. I beat the first monster, then immediately died to the second one. I managed to beat it after the respawn but immediately died to the boss. Then proceeded to bash my head at the boss for a while until I gave up and pick the "Accessibility" option. After I chose it, I found out that I was in the mere beginning of the boss. I lost about 4000 HP until I managed to beat the boss. Safe to say, it's not the game for me. I am glad I gave it a chance though. And glad I supported you, author. Props on finishing the game.
On another note, controller support completely did not work for me. I tried my DualSense and found out it just does not register inputs. However, when I tried to use Joy2Key for DualSense to imitate a keyboard, it did do that but the game also kept switching between controller and keyboard inputs as it seems that it somehow registers that there is a controller. When I tried my 8-bitdo SN30 Pro 2 I found out that it mostly works but the Cancel/Decline option does not. So I ended up playing with keyboard.