The Curse 'reduce xx% of the opponent's current LP' is bugged, it causes 15 damage per turn instead. Also, until the 5th turn, the player don't has much options, so maybe it could start with 3/5 cards and then gain one for turn, to get in the strategic part to change or not the curses in field with the curses in hand.
Beside that, nice and fun game, easy to understand the rules and beautiful art and sfx. Congrats. :)