Good work! Played a few times. Best I could get was to enemy 7. The core combat and upgrade system is pretty neat. The starting health of 10 seems a bit low, and makes the initial difficulty curve very steep. Some idea of the damage range of the enemy would be helpful. I couldn't understand how the turn system worked. How many times I could play cards before it was the enemy's turn again. There's a number on each card that looks like it might the cost to play, but I wasn't sure of the total cost budget in each turn. In some cases there seems to be a discrepancy between the amount of damage or block on the card and what actually happens. Given some more information to the player, and a bit of balancing, this would be more fun to play. But this is a good start for a jam. Well done!