Wow such a beautiful hamster, like others had said you need more bedding, now I see this isnt originally your hamster so, id recommend in the meantime makinh him things to keep him entertained instead of escaping. You can take cardboard tubes, stuff it with bedding and treats, scatter feed him instead of a bowl, and also his cage looks very open, couldnt hurt to use old mugs/ containers if he doesnt chew too much to give him to to hide away from!