This game is fantastic. I daresay it's probably better than the paper version (haven't played paper). Dominion is a great game but I like this one a lot better. God forbid if developers try to make some money; many other games on Kongregate have paid items as well.
I've paid for everything and I haven't regretted a single cent.
If you know what deckbuilding means or if you like card games in general you're in for a treat.
I must say this game is just plainly badly balanced... You pretty much destroy everything before they take 2 steps, and lo and behold a huge ninja pops in and walks all the way to the gems and touches one just because you missed one of the 4 meteor spells you missed... A little better balance in the waves would go a long way for this game... And of course more variety in general...
 "Thunderstone"){kind=icon}
 "Cursed Treasure: Level Pack!"){kind=icon}
 "Kongai"){kind=icon}