nice game, lots of smooth elements in there and I like the mechanic idea of the growing and shrinking.
Some feedback on a couple of bugs if you want them:
Some of the trees at the edge are a bright green without texture, and seem to have no collider as you can walk through those ones. (I know I was doing something unusual)
Also, the game didnt capture the mouse, so I was only able to turn the camera left as far as my mouse would go on my screens, and same with right. I had something very similar in my game failing to capture the mouse! I believe with webgl specifically, you have to capture the mouse (exclusive) on click of a button. I tried it on mouse down and that didnt even work.. had to be on click.
Hope those help, it worked perfectly otherwise