G key to change the ghost effect F key to change the fisheye effect C key to change the color P key to pixelate M key to mosaic W key to whirl B to change brightness Green flag to reset it More descriptions of what everything does in the Notes 'n' credits
Ghost effect lightens it (Basically brightness) Fisheye expands it Color change is exactly what it sounds like Pixelate makes it pixels Mosaic makes it into multiple Whirl twirls it Brightness is brightness