Hi 20Lsearle!
I read that this is your first game, it feels really good for your first attempt.
I am torn. Initially, i thought you should include a timer, because a visual telling the player how much time they have left can really put the pressure on them. But I wanted to beat your game, and not knowing how much time I had really made me feel anxious. This feeling is good in a game jam about speed. So I decided I am a huge fan of the lack of timer, great job!
Next, in terms of audio, its really important to give your player some feedback when they are clicking on a card. It helps to create a more immersive experience and keep your player engaged. Something as simple as a card flipping noise can really make this game pop! Also maybe some explosions!
Finally, there was no fanfare to tell the player how awesome they are for completing the task! Try to add something like a win screen or noise at the end of the game. The "carrot" on the end of the stick should be a big one so your players want to play over and over again.
The art is amazing here. Overall a great first game and I wish you the best of luck in your new game dev journey. Cheers!
Best Regards,
Brandon from TheIndieDream