Pretty calm game, and the music is soothing.
Having the path shorten when you walk on already marked tiles was a nice touch - it kinda provided undo functionality when I screwed up.
I agree with other commenters on the camera part, and the second level felt a bit long, I guess you could create more compact puzzles although that might require adding more mechanics (parhaps a tile that allows to cross paths of different colors). Also, I'm not sure but felt like one of the passages was too narrow for me to solve it.
Haven't seen similar games though, good job!