Chedditor is an in-progress level editor for James Pond 3. It supports both the Sega Genesis and Amiga AGA versions of the game. Because it’s currently an alpha release, many features that are planned simply aren’t available yet, such as allowing art to be modified, or scripting the switches. There are a number of bugs that may show up during general use. But overall, the tool can still create a fully playable level.
Be sure to read the included text file for important information on how to use it, as well as a partial list of key bindings and tips on how to configure the program.
For a quick tutorial on creating a level for the Sega Genesis version of the game using Chedditor, check out the tutorial video: https://rumble.com/v4cwdfc-build-a-quick-james-pond-3-level-from-start-to-finish-sega-genesis.html