Game starts at bid phase where each player should bid the most comfortable amount of gold to the bank. Double the lowest bid will conclude the total bank of that game, which will be granted to the winner.
Each card has 3 key properties to look at, attack (which is represented by green number), debuff (which is represented by red number) and card ability if any. Attack will add to your score, debuff will drain from score of your opponent. Card abilities can be triggered by various factors, most popular is - OnPlay, which means that this ability will be triggered as soon as card is placed on the table.
Also each card has several other properties like Tier, which can be one of 4, where T1 cards are most accesable and basic, and T4 cards are most powerfull ones. In addition to Tier each card can be one of four rarity - Normal, Rare, Epic and Legendary. Card stats and card abilitiy can change on higher rarities. Card rarity can be upgraded for your deck cards by spending gold.
Along with normal cards hero cards also exists, they can be played only once per game and can not be removed from table by any other card or ability unless specifically allowed by that exact hero card. Hero cards must be one of 32 deck cards prior to the game start.
In addition to that each round special round ability that is chosen randomly will be applied to each player hand, deck or table if viable. Player who have won the most rounds - wins the game. Player who have highest score inside the round - wins the round.
After game ends you will be granted or drained your match making rating accordingly, in addition to that you will be granted some crafting items and bank gold if you are victorious.