This cheat only works for windows.
Open computer and go to your defult hard drive. Open program files. Click on the file "Marble Blast". Then open Marble>Data>Shapes>Balls. You will see a file named base.marble
Then get any image file from your computer and copy it to the folder with base.marble in it.
Then copy this text base.marble Rename the orignal file anything (as long as it's not the smae as one of the other files) the rename YOUR picture file base.marble Open marble blast and play a level. The marble should be blue. You will travel at supre speeds!!!