Really well done, I love it especially because you manage to make me think i probably cannot take over this thing and suddendly i am rolling flying tree :D
Generally very creative use of the mechanic in 2d :)
Also your team did a really good job with the art/soundtrack too they are quite great :)
To give some constructive feedback too, it would have been great to have different movement behaviour for different objects to allow for even more interesting gameplay, but I am not completely sure here because then the game probably wouldn't have been as funny as it is :)
Well done :)