No a bad game, but very hard on the normal level. I would suggest to use the "casual mode" as normal difficulty level, and the current normal mode as a "hard mode". this way you would get better ratings, as the game would be less frustrating. 3/5
Northern Europe should be named Central Europe, and there should be a connection to Scandinavia. Naming western Russia "Ukraine" looks the be a little bit insensitive in the current political context. Overall a good conversion of the board game. 4/5
Going to the next floor does not function. Additionally, the concept awkward. Providing a way isn't difficult or challenging, just annoying as you have to wait for the random movement in the desired direction. I would rethink the basic concept...
I like it, but most of the time you start to focus on the radar, as the enemies rarely come close enough. maybe planes could be smaller an the view could zoom out a bit. also ammunition is unlimited, so one dedicated of firing nearly all the time, as it is not to obvious, when you hit the enemy. still... 4/5