Splendid colors! Definitely my kind of ambiance ^^
The art is wonderful, and I can't get enough of those cards; they all look so nice!
Since I saw you were also planning to continue the game after the Jam, I think the game can be improved in the target-hitting feedback. It doesn't feel that satisfying to hit the enemies, since the sfx is a bit "light", and they do not react that much to our bullets; maybe having them fall back a few meters could make us feel the impact more for exemple?
And adding some kind of "alarm, which indicates that the round is almost over (the screen gets red in the corner, or the music could accelerate even more).
Love the variety of cards+enemies by the way!
Congrats on yourA game!