Neat idea for a simplistic clicker. Right now it's a little too straightforward: the more non-miner items you buy, the more bonus you get. I'd love to see this idea expanded in a little more complex game, but nice entry anyway!
As a first clicker game, and already struggling with balancing the game, that's true, I keep things simple.
As a jam game, I'm thinking about developing it a little more, indeed :)