Heavy - 500 mb. The contents added just like texture, materials. I don't know if inside this world charge more objects, but the player cannot see it. So, I mean, if you add more levels, like 7-8, it is 4 GB of storage?
Yes, good theme of the game, just adding more levels and some theoretical history, could be enough and suitable. More lecture, interaction, and some puzzles. The graphics are okay.