Great Entry! Having the visuals blurred in the background is a nice idea. Also the idea of spending previously earned resources to obtain new ones is a great design choice!
Adding some music or sound would greatly improve the gameplay experience. Also showing a tooltip what each purchase or click does would be appreciated. And having a x5 or x10 option would be very nice, because "I need more dwarves!!!" :D
As a small glitch/but: at least on my screen/resolution I had buttons on top of each other.
Other than that, solid entry!