Played for a while, I think I got what you are going for, and it is quite interesting indeed! Can't complete the game because the game keeps telling me not worthy of the final battle, despite I already cleared all rooms and gotten all the green gems. Not sure if that's a bug or not. There are also a few issues such as no explosion effects and missing third item cards, but I guess they are easy to fix. I would also suggest at least adding a name or even item descriptions to all those items, just to give some context or some instruction on what the player should do with.
Anyway, it's not bad at all. Good job!