Very good visuals! I especially like the card hovering animations. I do wish it has some better sfx when you play them though, right now it's just a very quiet "thunk" sound, which is not very satisfying. The music is kinda nice, but just a little repetitive since it's so short, but it does have different songs in the different levels, so that's a good thing.
With the traits of the card being so small visually and the traits of the fishes being hidden by default, I think it kinda devolves into just playing random cards until you draw into whatever card you remember as super effective on a particular enemy, which I found not exactly super engaging. I found it to rely too much on memorization instead of strategizing and that is not as fun.