Cool concept, would be nice if there were some more indicators when the lights are too far away from each other. Missing some “game juice”, which is basically effects, feedback, etc to make the player “feel” their actions.
The first levels could function as a tutorial by showing instructions on screen, the game is basically unplayable without reading the description first, as no controls or gameplay is explained.
Also worth thinking about making a 1 player version where you can switch between the lights, as not everyone has a buddy to play with.