Thanks so much, really glad you liked it!
Yeah it could definitely do with some relics/card upgrades/shop upgrades. I've got a bunch more ideas for it, but we decided to go for more polished, smaller number of features, instead of trying to do too much.
But I'm going to come back with more for this one for sure. I'm thinking a THAT card, and ANY card, a SOME card., all with their own identities and quirky little rules!