Its impressive what you managed to accomplish in the span of a week! It feels polished, deep & thought through. The pixel art is lovely and the music blends well (maybe small comment: I struggled a bit with reading the font from time to time ; it does have a great pixel-vibe but to the detriment of legibility).
I did struggle to progress in the game ; not sure if its a balance thing around the #and types of cards in the original hand, or that you run out of options a little too fast? (might also just be me being bad at it) But I can see how with more playtesting & balancing this can become a great game!