Good game. I got a bug on the last level. I found 5 differences, then the sun rose, then I used the hint to find the last. The difference was changed on the images, but the game did not ended, and if I clicked the last difference, it played the animation for that again and again. I had to restart the whole game.
This would be an excellent game with the possibility of saving and more readable fonts (And maybe the possibility to upgrade units between levels).
3/5
Great game. A bit slow on my machine though, even on minimal settings.
And I don't think it is so hard, except the last 2 levels on Admiral level. Until that, close combat is enough to win almost everywhere.
5/5