I would love to see the art if you had more time, it feels like you have a good direction. I played it for a few minutes and I enjoyed which means you have a good loop and it's a solid jam entry! I think the enemy spawning may have been broken. I made it almost 3 minutes but I stopped because it was becoming increasingly more difficult just to find an enemy whereas in the beginning they were abundant. My guess is the spawn algorithm was inverted?
Like Znerol said, I also did not enjoy the sound effects but I understand that sometimes you just need to get something in there. I would have like to have seen the cards be positioned directly underneath the player character somehow. It's too much to ask the player to constantly have to look away from the action in an action game.