Ok- gotta say- this game grows on you! At first I didn't love it- the controls felt a bit floaty, and the game felt easy. Not for long though! Soon I was moving stuff, to use as platforms, or moving obstacles out of my way. I liked, how I could just carry a platform and use it for a longer time! Also- the "chasing" screen gave a nice feeling of tension! The fun factor is definitely the strongest part of your game!
Graphics were ok, and music worked, but I'd like a nice "boing" sound when the character was jumping. Adding stuff like this takes only a second, but really adds to the game-feel.
As for the use of the theme... It was ok. Nothing revolutionary, but I guess implementing something more complex would make the game overly complicated, which could be annoying with fast paced gameplay. Maybe if there was more kinds of platforms the player could use?
Over all- I gotta say, that's a pretty good game!