This is an interesting idea for a puzzle, using your shadows to illuminate the surrounding. The graphics were simplistic, and the audio was minor. I applaud your multiple levels that you crafted well (I got to 19 before getting stumped). I understand why it takes so long to move again, so the fading light can illuminate the surroundings, but playing each level over and over again it feels like extra noise. Have a regular speed, and if a player wants to take it nice and slow, they will play nice and slow, but you don't have to slow down the game for everyone else. Really well done, good job!