I love the concept of your game, but it is way too difficult to read what things do at a glance. I love the Emoji as mana idea, but the fact that the default hand spread covers up mana costs and symbols when they're all the same color is UX gore. Rather than showing all of the resources I have at the bottom right next to my trash, it'd probably be better to just show all my counts at all times; even if I have 0. And to grey out my cards that aren't usable. Because I find myself constantly trying to use posts that I can't.
But the idea and general aesthetic execution here is phenomenal. This is a few smart design decisions away from being gold.