I like the concept here, and managed to complete all 3 puzzles; admittedly, I had to take a few rewinds to take a closer look, but eventually figured things out. I also like how later levels would have you find the right spot for the spotlight.
One annoyance would be picking up items and then dropping them; often Drop command wouldn't appear, and after a bit of mouse juggling it would appear at a position where the item would end up in a weird spot. I feel like my playthrough would be significantly shorter and smoother if not for this oddity.
The graphics were fine; too bad there was no audio. Neat entry, overall.