For me, I'm considering this best flash game.
I would like to some simplifications:
1) Remove the "Skill Tree" and put only three buttons on the tab of the unit to upgrade.
It's tiring to click on the drive, click on the tab of the unit and finally select an upgrade.
2) Remove the flag of the Map "Your Base Camp" and add the menu on the left side, a bottom "tavern" where we can acquire and mercenaries. And always have five random mercenaries available each victory.
3) The information under "Incoming Enemies" to be built bottom bar visible during the attack and add an autostart option in 10sec.