Nice game. I wished I understood the rules a little bit better, especially how damage is dealt and life is lost. Several times, I lost some life (and the game) when I thought I shouldn't have because my cards had much higher stats than my opponent. That being said, I don't usually play these kind of games so it's entirely possible that I'm missing something obvious. I made it to the volcano (but not to the top) and played in normal.
Anyway, I think it already looks and feels really nice and it has an interesting weird and otherworldy atmosphere. Good job :)