Possibly the most creative mechanic I've seen in this jam, and what you have shows it off pretty well even if it's not exactly a finished game.
In the outdoor level it seemed like I couldn't consistently manage to stay in shadow, and so the way to get from point A to point B was just to sprint there as fast as possible. Maybe with more experience with the mechanic in a longer game I would be better at staying in shadows, who knows
(I assume I didn't miss something, and that was the final level?)