My deck is the best

2.You have a decent deck capacity(60 cards as opposed to Sacred Cards' 40

The game has pleanty of cards from real life and the seiries but you could simply buy the stratagey guide and construct a perfect deck frome all the cards and no one would be a match

Eventually you unlock more characters and slowly improve your deck.

In the beginning you have the choice of three decks to choose from, I suggest the darkest-colored deck, you get 'Summoned Skull' which is of great help against Yugi.