Likely means that the game has too big of files that your project depends on to be shipped with it on a floppy disk, I believe. Since I use .net, all the libraries I use come on-board any Windows install. Scratch is not native to Windows and requires us to have Scratch. I think for Scratch projects to qualify, you have to be able to completely ship Scratch with your game, but don't quote me. I'm not 100% sure.