It starts off as a pretty fun game, but then it starts to fall flat. I didn't hve a problem with ranged units in sudden death because I just roll around kitting the enemies and only using my abilities. That pretty much made each mission easy, but absurdly grindy. The AI missions are also crapshoot because of how terrible they are at doing their job, which means they can't survive at all past stage 10 or so.
I think this is a decent game, but the economy is totally broken in my opinion. There's simply not enough production. Having only one construction slot doesn't help either.
So after the Apr 30 update, my game loaded once, but again fails to load afterwards. Seems to be a problem with IE though. Works perfectly for me on Chrome.