Maybe you want to add The Market button on that "Choose Province" map? Since imo, the most usable upgrade are those from The Market :P
Yes, i know that player can simply enter a province, and access the market from there, and quit the province (if he choose the wrong province).
*Got a lot of money from previous round* Ok, let's open the pipe wide...
and set a lot of jumper below,
a lot of turret on the ceiling,
a lot of rotating-chainsaw-looking (forgot it's name >.<) on the middle...
and... *presses spacebar so hard!* ...
so, tell me.. when will the counter stop? xD
the bird eye view aiming is crappy. but the 1st person aiming much better.
perhaps you might want eliminating some unnecessary smoke? graphical lag much when enemy tank destroyed in 1st person.
 "Super Samurai Sweeper")
 "angry birds")
 "Epic Combo!")
 "Tanks2")