Really enjoyed the aesthetics. Good choice of colors, very nice music, and very well done animatics, particularly in the ending sequence.
I found the mechanics to be really hard to understand, though. I liked the idea of fishing for new cards, but it felt a bit arbitrary at points, with me having little control over the result. There were some battles that felt downright impossible, with me losing even after getting every coinflip right, which is particularly frustrating since any defeat results in losing all my progress.
I feel like there's a lot of potential here, and the biggest bottleneck right now is the conveyance of the mechanics that are already in place, but not very easy to parse.