Weird squiggly on game screen

I had to reload the files on my makerbuino so i deleted all the files on it. Now, there is the game picture, and next to it, there is a squiggly game picture and its the same for every one. how to get rid of it?

Hey there @Duckioboi please reach out to us at and send us a few photos of the screen.

Dora from the CM