The UI, sounds, drag and drop, etc were really slick. Once I realised the counters it was pretty straightforward to beat the levels although I guess the score is higher if you use less resources?
Nice work.
The total score is a weighted sum of surviving units and current gold:score=(units×1.2)+(gold×2.0)
I spent time making sure the colors for the units and ui matched up, so I am happy you liked the look. Thanks for giving it a try!