In Sym you are going to play as Caleb, who can exist only in the white world and Ammiel, who can exist only in the black world. You can switch character by going "inside" the level tiles: if you are Ammiel black is hollow and white is solid, vice versa if you are Caleb.
Here's the first ten levels of Sym, in the final version these will be gathered into two chapters: "Down the rabbit hole" and "My own little world".
Download the demo here: Sym v0.4beta demo
If you liked the demo, please support the development of the game by pre-ordering it: