Hey! Yes, the main skill-element here is what cards to pick based on what "modifiers" you get. So 5% more red means that from now on, the chance to land a red number is no longer 50:50 but 55:45. So more red cards would be slightly advantageous.
And no hover-UI on abilities yet, but thats high on my to do list! Appreciate that its a bit bare bones right now, but wanted to see if folks like the concept before I spend weeks of work on it! :)