I like all the 7 levels. I've finished all on easy difficulty level (because of the easier test of my fan-made Hungarian translation, what I've also done! We found the video subtitles, and added a string to "rolik.shadvs", and made more subtitles for first and last (secret letter) videos...
...There were some really hard sentences for me, especially some of the "VCH" strings of last mission, but the Bogomolov's book gave a big help to understand and translate them...
) ...so I've finished all the 7 level on easy, and I've been finishing all of them on the hardest (diversionist) level. (So far I've done the Bletchley Park and Renegades with perfect ratings)
All missions are very interesting and perhaps they have some real historical backgrounds.
The rainy airfiled not far from Prague, the foggy castle near Paris at early morning, the Ukrainian village in august of 1944
, the Jagellonian castle at night, or the English people who talk about weather, or Americans talk about Hitman
...etc etc. are all very nice. Maybe the first mission is the most elaborated scene, there are a lot of possibilities to complete tasks. ("anti-aircraft" and "radio to group" tasks)
OFF:
by the way, what about Adventures of Captain Vrungel? I saw, it's been developing for a while! I'm looking forward to it! It was the one of my favourite cartoons of my childhood!