A great game!
I liked that you could sacrifice your cards for a train boost, making you vulnerable but complete the level faster or using it for self defense.
Although, im not sure if its a bug but, in the last card, im always able to restore HP due to that card drawing always if there is no more cards. But if i burn it, i no longer receive any cards and im not sure if thats intentional or not.
Anyways, good game!