A very clever game, with polished mechanics, visuals, and audio (I love how the pillar growing & shrinking wasn't just a sprite scale like some games, it was actually different sprites!)
I wish the aiming beam was a bit more visible against the dark background - on level 5, I didn't even realize the beam was a "physical object" that could be stopped by obstacles, and even in later levels it was hard to see where the beam was aiming when I pointed at a mirror.