Wow, this is so polished for a game jam! Everything from the gameplay to the sound effects to the juice. I love the endless possibilities of synergies when combining the powers, I had some pretty crazy combos and managed to get 150k on one of my playthroughs (which probably isn't that high, but was better than I had been doing haha). And... I couldn't stop playing. I caught the "just one more time" bug pretty bad.
My only thought is I would love some kind of tutorial. Obviously, nothing that explains every card or anything like that. More about the scoring. I will say I'm still mildly confused about what the multiplier is multiplying, or if destroying cards gives me points or just makes the game last longer, or really how I am getting points aside from the cards that explicitly add points. Is each round worth a number of points and then the multiplier is applied to that number plus the cards that give you points in the round? I'm guessing that's what it is, and if so, I don't think stating that takes anything away from the discovery of the game, but does give players who have no idea what's going on (aka me) a good starting point.
Either way, I really enjoyed it. Great job!