Good but not great
It's great as a 2D gamewhere you have to shoot, but it's slightly unrealistic in terms of cover. Neither the Germans nor the Russians charged straight down streets, shoot like duelists. a crumbling brick wall that will be destroyed after hiding behind it to long is not without merit for this game.
Simply great
I've seen quite a bit of flash and have played many games, and this game really gets almost everything right. The balance between plot and game play is sensible, and there is a good compromise made between the gritty aspects of the environment and the cartoon-like aspects.
Maybe I'm biased towards this game since I'm a little bit of a WW2 buff, but I think others will like your historical approach the way I did. You didn't try to be too dramatic or serious, but you also didn't treat the battle of Stalingrad like a joke. What could've made it better would've been an initial cut scene describing the dire state of Soviet Russia, and the bitter savagery of the German invasion.
That said, this game isn't perfect. There is too little mercy for failiure, which I realise is a design choice, but its simply frustrating to have no chance after the smg guy crosses a certain line. My suggestion would be to give your player a small amount of life. Not so much life that the realism and gritiness is lost (I actually really like how you don't make the player invincible, and have them react believably to being in the line of fire), but also make it so that it is possible to kill the smg guy.
In my experience, the difficult game done right is a game where it is hard, but not impossible to succeed when the odds turn against your favor. When a hard game is done improperly, its literally impossible to turn the game around. Rather than being stimulating, this scenario is frustrating.
So, in conclusion, this game has a laudable sense of style, game play, and originality, but still does not achieve perfection.
A good game, with a few flaws
This seems like an excellent game, but I do have some complaints.
Firstly, the lack of ability to change the Anti-aliasing levels (quality) lead to massive lag on my POS computer. Secondly, if you get killed by a machinegunner, you have essentially lost the game, because every time you respawn, you appear in the MG man's line of fire and instantly die without a chance to shoot. You can't rely on your support to kill him for the same reason. It's a good game otherwise.
When you respawn, Sokolov actually runs into the screen from the right side. At this point you have the ability to move him up and down, thus avoiding getting shot again.
Great fun
Not too hard, but not too easy, wish there was some more stuff with shanina, or some plot. Can't wait til the next one :).
Short and hard
it was hard at the final level when both tanks got on and half my troops were killed... id literally respawn and die right there. Managed to win though... i lost control of last level like 5 times, 4 of them were saved by ONE grenade.
The enemies seem to clump often *HINT HINT*
Make more levels and maybe more units that can be out. And like boss levels, like a giant tank that needs 3 grenades to kill but drains your supply of grenades every so often so its hard. Idk, just ideas