Alright, it took me some perhaps one hundred edits and a post broken down between six parts, to present my game related ideas for your review. Enough is enough. Breaktime. Post link HERE.
EDIT:
Instead of having the faces of units at the left of the display, perhaps it would be better to have symbols of the classes they belong to, beginning with a Captain, then the Troopers, then the Medics, then the Gunners, by the order of default AP amount. The player could employ perhaps up to nine units in the squad. Furthermore, each unit-class sign would be associated with a name, given to the Marine for better particular recognition. Beyond that, the sign would be accompanied by a number, pressing of which - normally, on a keyboard - should instantly switch to that unit. There could also probably be an information about both the current and the total HP and AP of a unit.