For all the people complaining there is no tutorial, there is a mud and blood wikepedia page at http://www.mudandblood.net/wiki/index.php?title=Main_Page
It would be cool if you could tell vehicles to stop firing as well as units. Kinda annoying when a bike or something is over your guys and your tanks massacre your units to get at it. Still, great game 5/5.
Haha you can actually have just one invisible guy up top along with like 4 WESPE's, and you'll last a long time. The WESPE's will pretty much gib every advancing german going your way. I lasted like 50 extra waves just from this :D.
Easy way to get badge- let the flying guys build until there are about 20. Then shoot all of them down, you should get a massive combo and like 5000 points :D