If you want to draw completely new paths rather than just changing ball speeds, editing raw text code can be incredibly tedious. Free community-made level editors provide a visual interface to draw paths with your mouse. The Zuma Path Editor
Method 1: The Built-In Free Tweak Method (No Downloads Required) zuma deluxe level editor free
Check out this demonstration of a custom path created using an online level editor: If you want to draw completely new paths
Unleash Your Creativity: The Ultimate Guide to the Zuma Deluxe Level Editor zuma deluxe level editor free