Use Ctrl P for screenshots, they save to [Blockland Folder]/screenshots. Someone's probably going to mock you for using a Mac.
It looks okay, slightly more detailed than most, but I have a few suggestions.
- The movie screen - it should be square, not Undulo... Maybe do what most do for TV screens and use rainbow, or use the Animated Blocks for a short 3-frame animation.
- The chairs - the back looks too thick and nearly all movie seats are the "flip chairs".
- The front - the cinema has no logo and no windows?