Your main mechanic is super interesting. I love how all your gamedesign ideas interact with each other (for eg : fire wich burn the bush but could be usefull to burn the blackberry). Sound design and particle effect really add to the juice of the game. It was fun to play fun but I think some interaction kind of broke the experience : for example, trying to recreate a bush on the side of another is kind of hard if you are just on top of it or just under it, you have to make a weird and not so easy jump for it. I also think that the generated level design (or I supposed to be so) doesn't lead ultimatly to inovant situation. I did 80 points to the game, and my main strategy was only to make a column of bush. I think it is strongly related to the weird jump describe above.
As another comment said, I would love to see your mechanic in a more linear level-based game, I think it could lead to a great game.
Congrats for your game, you really have some good ingredient at your disposal :D