I remember when I first saw this game I thought, "Why would I ever play that?" It has now become my all-time favorite flash game. I would buy the thing for my computer if they made it available.
@jawadj: It's been a while since I beat this one but if I remember correctly he is very vulnerable to poison.
Get him up to 9 poison and he should go down quickly.
I liked the puzzle element of it. It was more than just figuring out which one to use but also how you would need to affect your environment.
I like puzzles and this was one of the better ones.
Not so hard it wasn't relaxing, and yet difficult enough to make me think some.