Quite Decent.
I liked the game, but I hated the combat system.
At first I'd thought the combat would be like Magic, but it turned out to be a random-stat-computer-likes-to-bs style. It's very frustrating when your 6-8 attack creatures cannot take out an enemy with 3 defense, especially when your Gold Dragon (8atk) gets a 0 against an Assassin which gets 1. Seriously.
Also, I believe creatures being summoned should not yet count as if they were in play (more like Suspended), and therefore players would be forced to put a few inexpensive creatures in their deck or take a few hits in the beginning instead of throwing up a giant wall first turn.
But overall, fun game. Got to level 5 before I hit a giant wall of 0-3/6-8 attacks against 3-6/4-6 defenses.