I can't really find much strategy or thinking in this game. it seems to me that the only thought really is in picking the card that grows in stats the most when you level it. the abilities are rendered useless because they make your card cost 1 more, so the game kinda just revolves around stat points and that's it. I think I'd appreciate it more (though it would take much more work) if every card had a power to begin with, making it more similar to how Pokémon is already.
This is just my opinion, and if your target audience isn't supposed to be people who like strategic thinking or decisions then don't listen to me. How this game is now though, I assume I'm not the target audience, and I like strategy games.