I might noticed a bug: after completing a level the star rating panel appears and when you click on go back to menu the earned star aren't added to the total stars and the next level is still locked.
a typical nerdook game. Full of nice ideas but it lacks of content or simplified mechanics. I get it, it is a short game, but I would love to see something bigger, longer, and more progress in hero development.
ok, found something to the advancing
The more you advance, the less blitzes you get.
Germans rarely change tactics during advances.
The less you advance, the more enemies you get.
is it too slow?