Interesting, so specifically after playing a card, it is not automatically restoring a new card in the original place as the card that was played? I am not able to replicate in chrome or firefox. Are you using a different browser?
I'm using edge. Each time I played a card no new card was ever added to the hand and once all three original cards were played all I could do is hit end turn till I died. When I play a card a new card appears for a split second and then never gets added to the players hand. I did happen to beat the first enemy by getting 2 swords at game start.