Fun game! I liked the interplay of the leyline tiles and the regular tiles, and the constraints on placing tiles (based on the leylines) really felt additive.
I agree with roqumgames below that the edges were not always easy to distinguish from each other - my thought is it's because the base of the tiles is always green. If the ground had a color that matched (or complemented) the terrain color, I think it woulda been easier to parse quickly.
Here's my first playthrough of Realmfold. Good work on getting this out!