I think that's a very good take on the theme! Once I made a bullet hell + memory for Ludum Dare, memory games are kind good to mash with other genres :D
With some polish it could be a very solid product, really! As you are a beginner (as you said on Twitter, hah) - that'll be nice to make use of that game and develop it a bit more. For example I would add particle effects and some screenshake when you match the cards - that adds a lot!