Finished it, that was fun. I do have a couple things I think would make it more fun, or rather less cluttered in a way?
First, remove collision between cards & packs. So they opened cards flying from right to left don't interfere with purchasing new packs to restock the opener.
Second, add something post collection completion. Like from a different perspective, you play as the god that interferes in multiple people opening packs. I dunno how or what specifically, but I think it would be cool to see a NG+ where we are the entity within the void xD