You definitely have something here. I really liked the game's idea, the cards are interesting and the mechanic are simple, but fun. I wish you could explain better (in game) how to play, because I am not sure if is so clear. Anyway, I hope you keep this idea in mind, because I think you can make a very good game with a little more game design!!

Fun card roguelike. The fusing mechanic was interesting. 

Getting some money from defeating enemies would've been nice as it made the shops kinda irrelevant  having to sell your items to be able to purchase items.

Removing the places you've visited from the maps would also be a nice touch.

But overall very good.