How big is the Unity file?

Is there anything smaller? I wonder if it’s a gigantic mess that will take too much space?

Well, I have a survival sandbox game that has been exported, and it takes up 120.7 megabytes of data. The executable takes 10.7 MB, and the data folder takes 110 MB.

The things that really increase this size are scene files. Try to keep your scenes to a minimum. For example, instead of lots of separate options screens for the main menu, I am trying to compress it all into one scene, the GUI of which changes.

120 MB isn’t too much, so I doubt that it should cause your hardware any problem, but if it does, just try to reduce game size. Scenes can be replaced by GUI, for new sets of buttons, and GUI Textures, for backgrounds.