I mean, I can't make my dress-up game large on Deviant Art without things getting cut off.
Oh so you mean you want to make the canvas size bigger? That's no problem. You go to Modify > Document, and change the size of your Flash document just like you would edit a canvas size in Photoshop or some other program. 
Just keep pixel sizes in mind. I hope that's what you meant for making it bigger.
Just keep pixel sizes in mind. I hope that's what you meant for making it bigger.Ok, thank you! Yup. 