Intriguing concept, but missing a lot in execution. I could intuit what hires are best suited for what mission given the colors and icons, but there is so little feedback on what is really going on.
What is gained from these missions? I can't clear them all, so how do I prioritize my effort? What do the little Flower or Crown on the Hires mean? Mouse-over descriptions, or even a Glossary Page would go a long way. And more clarity on what can be gained/lost in the mission screen.
Positively, the UI is a nice rendition of classic Windows, and the henchmen art looks fun in the thumbnail.