On area 8, I couldn't relocate the view to anywhere below the uppermost level. I couldn't follow tanks south or southeast. I reloaded the level and the same thing happened. Is that intentional?
Unit selection is awkward and annoying - example, when I want to select the factory and end up moving units there because I didn't press shift. Corners are difficult to maneuver in - couldn't drop the gold mine in the lower right corner in Australia because it was under the "Shift to deselect" bar. Otherwise, good game - seems balanced with enemies and difficulty. Kind of easy to spam the bigger units but having a limit of 40 seems to even that out. Nice job.
There are 2 bad guys trying to kill an indestructible wall of mine. They have been at it quite a while and of course, the walls are indestructible. Should have an option to drop bombs or something mid-round, or something to take care of this.
1. Why can't I call out a new wave before the current one is dead? (With a $$ bonus for doing so.)
2. Speed up should be even faster - perhaps add a second speed up.
Good game, requires thought and planning. Two things I'd like to add: Fast forward button and the ability to scroll over the map. (When I'm in Jersey, I'd like to see Cali.)