VERY important boss tip: Your shadow will kill you if you touch it; it mimics exactly what you did approximately 2 seconds ago, so vary your movements to avoid running into your former self....
Also: Excellent game, I loved the unique feature implemented into it. The difficulty was a bit high at first, but the game is still definitely doable. 5/5.
I love the game, though it would be nice to have something to make the camera snap to a side, like if you were to hold Shift while dragging with the Look tool.
But for now, I still give it a 5/5 for a unique puzzle game with nice, calming music.
Just a small suggestion: Disable the shooting-on-click temporarily when you start a level, so that whenever you click "Start!" you're not getting rid of your primary shot charge? Other than that, great game.