Cute idea, okay execution. This review is going to be all criticism, because this is an idea where a lot of the value comes from thinking about the idea, saying "wouldn't this be cool", and once you make the idea, it's just work to get it finished. I guess it's a meme game? Again, really good idea but your execution has a few flaws
- Dragon drop for the cards would have been nice.
- Cropping the images instead of stretching could have looked better.
- When using the default waifu, you could color the waifu based on the suit.
- The gelbooru results were a little weird. I tried "rei", and no results. But searching "ayanami rei" (which I had to go to gelbooru to find) found a billion, as expected. You might not be able to do anything about that on your end.