La Haya is spanish for The Hague. The Hague is a seaside city. Hence, Costa La Haya.
BTW, this game is stupid. It's OK if you have money to burn, but the deckbuilding is downright poor. You start with a deck with 60 cards, half of which are crap. You can win extra cards, and you can add these to your deck (or remove them). Land count is updated automatically, but you can't tweak the land count. All I have to say about this: pathetic. If you don't care about deck building, it's an okay game. The AI isn't even as stupid as some players you see at prereleases (although casting a creature with haste in your second main phase when I have no blockers doesn't really speak in your favor). I play magic mainly because of the deckbuilding though, and then this game sucks monkey balls. There's apparently also a puzzle section, I haven't looked at that yet.
BTW, there's a free demo. I'd check that out if you are even remotely interested and don't have issues with Steam. I've seen that this game appeals to a lot of people who used to play magic in the past. Their reasoning is that you can play magic on the cheap with this game. That's simply not true. For the same amount of money you could get the same decks on Magic Online. Magic Online doesn't have AI though.