There are enough objects, for now, I am finishing the last part of the level 3. I have fixed some bugs with the terminal, now everything behaves correctly.
The last thing I need to do is add more dialogs checks position of the boxes and it should be good to go! Here are the size of the levels comparatively.
The level 3 is one of the big levels but the core of the game is in the level 4. The level 5 is the conclusion of the game. There is still a lot of work to do and a lot more polishing! The level 4 is basically the level 3 + level 1 combine in term of size. At the end of the level 3 I will be exactly in the middle of the game in term of content (level 1 + level 2 + level3 = level4 + level5) :).