I really appreciate the simple logic of light world/dark world reversing the object's properties - passable-impassable, mobile-imobile, killable-unkillable, moves left-moves right, hidden-revealed.
I also see that a lot of care went into the layout of the level, so that it's impossible to get stuck. Huge thumbs up for that.
Also big plus to the presentation for that little opening animation.
Unfortunately there's a lot of bugs with the game, some of them game breaking, but that's par for the course for Jam games.