Thanks for playing! Yeah, the rules need some work for sure to make it interesting, but I think there probably is potential - this is basically the simplest version of the rules possible (the equivalent paper puzzle I realised is “make a domino tiling where each baby elephant belongs to a different domino” which is inherently simple). I didn’t get around to figuring out the details of why you would want to protect adult elephants for example.
domino making puzzles can become tricky, there's a certain superposition logic similar to the unique rule use in the trees and tents puzzle, where the direction of association depends on some far reaching part of the puzzle, but typically you need multiple types of logic to make this realization happen before an understanding of how to collapse these multiple possibilities.