I completed the game from start to finish, with the tutorial being skipped. Found a couple of issues: 1. Achievement for completing Stage 4 didn't unlock. After finishing the game, I redid "The Battle of the Somme" again and the achievement still didn't unlock. 2. The achievement for beating the game under 60 minutes unlocked after completing stage 8. I still had stage 9 to complete....

how to unlock 3lvl of this game?

This is a very beautifully made game. I like the little scenes and the gameplay is fine too. The only thing I don't like are the timed levels, it's more luck then skill in those levels.