A Sad Game that comemmorates WWII
This is a great defense/shooting game that not only offers some bit of fun by shooting the crap out of other people, but portrays messages. This includes the messages of the violence of wars and has you empathizes with the Germans, even though they are our enemies.
The piano music that plays when you are about to die is a really nice touch and adds the element of sadness and hopelessness when you do die.
The sound effects of bombs and bullets contribute to the theme as well.
Some things you could add are more touches of realism, like better backgrounds or the lot of dead bodies on the ground.