Look, Nyan Cat only wants peace, okay? She's gonna give you two options: if you rub the flag and watch it purr, you get to ride on her rainbow. If you don't... well, you might have a donut shaped hole in your body with a variety of colors on the edges. (XD)
Although I drew a lot myself, I do also have to give a TON of credit to @RoastedSquirrel64, as I got the rainbow AND the star sprites from their project, "Nyan Cat Simulator 2015" (https://scratch.mit.edu/projects/57781430) I know this is my first project in forever, ya'hear? (:P)