It took a while to get used to the controls. Maybe decreasing gravity a bit would help. It follows the theme well to have fake blocks... But for a gameplay view that is a bit frustrating when you don't know which one to grab and got to start all over again if you made the wrong decision. Maybe add a few easier and more straight forward levels at the beginning too?
All in all it was fun playing your game and felt I was like a Spider Man. =D Well done!