As someone who is colorblind (Deuteranopia), the first level asks to swap the green and brown frog. With the hues used, I can’t tell the difference between the two frogs.
The frogs only move in the direction they face. Move them so that all the frogs facing right are on the right, and facing left are on the left.
Good call! The facing direction was meant to help, but I can see how the colors could still be tricky. I’ll look into making it clearer — appreciate the feedback!