Very nice cute puzzle platformer game :-)
Made it myself until the last level and then I had to peek the walkthrough after dying a lot ;-).
Very well made puzzle platform levels with these dark and light characters. Must have been some work to make and test the levels. Nice amount of levels and variety and adding new options in the new levels.
Controls were good and also the game was clear enough that I know what to do to bring them together (which was a nice ying yang animation by the way).
Cute pixel art style that was coherent and also the audio was relaxing and fitting for this kind of game.
Theme checked an no UI also.
Overall a very well made puzzle platformer game! Well done!