Level 30 trick: just attach the wooden thing to the wooden thing in the middle of the screen and then after its hanging on the egde, attach another one to the end of it and it should tip over the dude
Near the end i think, (i never got there) there was this red cube following me, so i kept avoiding it, then jumped up a little, then i was stuck in the black/colourful blocks (walls?) then yea.