Ponga was not designed as a photo editing platform. There are many very good ones in the market today, many are free and included with camera and scanner apps.
If, for some reason you need to edit, rotate, or otherwise manipulate any image you already uploaded to Ponga, you'll need to get access to the original file. We'll be happy to help you with that. Reach out to us with the Pongabot at left and we'll get you a link to the original file.