Creepy
Did you get some inspiration from the spotlight stage runs from Super Mario Galaxy? =P
I thoroughly enjoyed the puzzles you've designed, and some of them really had me going trying to figure out how to reach the door. For the most part the ending sequences seem to be a bit more like trial and error than actual thinking. Also, some of the messages written on the walls were too hard to read without a second light, particularly the one in the level where you have to light the walkway up top to the door with all five lights. And the end is a bit disturbing.
I also liked the subtle touches on the character that suggested it might have been a female.