1 level in and my file size is 3.55 gigabytes?? 
my game is low poly and using very basic low resolution textures . I am not using a terrain/landscape My sounds are the largest files in my game apart from the engine itself at around 55 mb … I supposed to be submitting the game to be played tonight and i cannot find a way to lower the build size which is currently 2.15 gb …My plan is to have around 40 levels at this rate my game is going to be pretty huge …