Warning! Contains sharp SVGs. (I don't know why I have to put some warning here) The reason why some files have to be small is for the page to show up quicker. Maybe the scratch logo is the next th- nevermind. I was going to edit that but with less worry about the looks. Look inside for more info, please. Be sure to look at the comment, as exporting from the costumes doesn't give you the true file. You'll have to copy from the note and paste it into an svg editor that supports editing the text of the svg.
Credit to the Scratch Team for the svg. I have edited the svg to try to make it less space taking.