Really cute, I liked to see a card game and how they move. Birds song are so cool and give directly a good energy. I found a bit hard without the explanation screen to understand the mechanic with the score for the next card, maybe a picto could help, but it's just for saying. I found the note as a multiplier very clever :)
I would've appreciated some storytelling for the why the meter is going down to add a bit more depth.
By the way Congrats, really appreciate it, made me smile to hear those birds!