This isn't a rhythm game? Just a timing one. The cards aren't timed to the music at all, so it's just a game of pressing a button when two icons line up with no musical component (a perfectly fine base, but not what's being advertised!)
The gameplay got tedious pretty quickly unfortunately - the cards move and appear really slow, and the angels other than the basic shy one have really excessive amounts of health, so the game quickly felt really slow paced and repetitive. Upgrades costing health is really interesting in concept, but they take so much of your healthbar for such lackluster upgrades that they just do not feel worth it - buying upgrades seemed like a death sentence every time I tried. The game also seems to have some really inexplicable and severe bugs - I had several occasions where the deck seemed to get stuck and keep repeating the same card over and over without counting down? Which in turn made the upgrades feel even more worthless, as I often wouldn't even be able to access the part of the deck where the cards I bought ended up.
On the other hand, the visuals are absolutely gorgeous. The character designs and stylization are so instantly iconic and appealing, it's such a cool aesthetic. Massive kudos for the artwork.