You vs AI. Shared deck of the 16 starter cards (2 copies each). Start with 5 cards and 20 life.
Each turn: draw 1, mana = turn number (max 10). Play one Creature/Hero/Legendary to your board (max 3),
plus Tricks/Reactions you can afford. Then Attack or End Turn.
Phone: tap any card to open it big. In the big view press Play (hand card) or Attack (your ready unit), or Cancel / tap outside to close — a tap never plays a card by itself. After Attack, tap a red-glowing enemy (tap your unit or Cancel to back out). Swipe the hand to scroll.
Attack / End Turn sit in the thumb bar at the bottom.