Yes ur right, buying same gamblemons is usually a bad thing. I'm working on it. Ninja is a bit op, the katana gives -20 scores and blood drains all your scores, but i don't think its overpowered because their weight is 1. But some values can change, maybe the values are a bit too much.
And yes, removing cards is too op rn, i'll probably give the player only 1 chance to remove an item every shop or make the price higher after every use.
The game needs tons of work, and i'm working on it. Thank you so much for leaving a review and playing my game (: