Love these kind of games, reminds me of an old Microsoftgame called Pandora's Box. I miss one feature from that game though. There you had an option to outline all the pieces, like a grid. It is sometimes very hard to see the outline of the different pieces.
I like to complete all things in a game, and in this it is impossible. I have done 49 of 100 ingame missions, and now I see it is impossible to manage the mission saying: Run 500 metres with single leader at once. Because I have bought the car, and starting teammembers. There should be an option to deselect upgrades. Other than this, a good game 4/5