This seems like a pretty cool idea. The only big issue is sizing the window properly, but I was able to work around that by resizing my browser. Other than that, I think my only criticisms are that there's a lot to keep track of right away and it's kinda difficult to know what's going on in the first playthrough. Maybe add more cards gradually to help players understand what's going on. Then also it's really easy to spam cards without really thinking about it and you don't really get punished for it. I think once you balance those two things you'll get a really good game out this. Good job on your first game jam :)