I like the idea of the game. I had a look but couldn't find the tutorial. I get the cards have a cost to play but missed where those values (my mana pool?) were on the screen. Looking at the screenshots it would be the poop emoji area?
Maybe if the player has 0 just show that, so they don't keep looking around.
For the cards I would suggest the card ability text the player needs to read clearer than the flavor text. At the moment it looks like you inverted that so I am reading the flavor text and not able to focus on the ability text.
The scrolling text in the background and the changing faces also make it harder to focus at least for me. So I would ask for an option to turn them off or to work at the general GUI to make it easier to know what elements to focus on the screen.