It took me a bit to come to grips with the mechanics, but this has a lot of depth!
I'm amazed you can do all this work yourself, especially a strategy game for a jam in about a week. That's a lot of work, and it all feels so right in how it all balances together. I started strategizing which items to buy next to discover new abilities, to manage my resources as I climbed my way to the top. I think with some more challenging combat this could really be something special.