Cool concept. A bit buggy though, and didn't find any cards for quite a while. Would probably be better if the card system was explained better and if the player started off with a few cards.

I like your take on the theme and the mix of card-game + survival goes really well. In terms of gameplay, I'll say the enemies are quite fast and i spent quite a few minutes running away from them. Theres also some playthroughs, where no ammo nor weapons cards spawned to pick up - i suspect that's a bug though.

You have an excellent template to start polishing the game and make it awesome :D.