I like the atmosphere, and placing the blocks didn't have any hiccups which can be a problem for 3D games. When I started the game up again to check something, I realized you were actually saving my progress. Most games here don't do that, especially after closing the game so great job there. It's only a shame a lot of players rating your game probably closed the game without even realizing it was there. I would recommend the Continue button be disabled rather than hidden to let people know their progress is going to be saved.