Upload your .vvv save file, edit the fields, then download the updated save.
This is for the Steam version of VVVVVV on Windows.
1. Go to your Documents folder
2. Open the "VVVVVV" folder, then the "saves" folder.
3. Find "qsave.vvv". That's your save file.
4. Upload it to this page to edit it.