A few parts were a bit confusing, perhaps I missed something? :) Like when I picked up "water" I could give it away as a "camera", and I didn't understand what I was supposed to do with the lightbulb? :o
I liked the style a lot! Low contrast without loosing detail, I had a lot of trouble with the boss, I really wanted to beat it but I was not skilled enough. Darn! I believe much of the reason I gave up was due to the absence of feedback. I didn't see the health of the boss and heard nothing when I used the sword so I had no way of knowing I was actually damaging it at all. I think that a health bar would've solved a lot of the issues there! And knowing "how little hp it had left" would probably make me want to try again and again. :)
Overall: nice job! :D